23371220 has 54 divisors (see below), whose sum is σ = 52421082. Its totient is φ = 8751776.

The previous prime is 23371219. The next prime is 23371237. The reversal of 23371220 is 2217332.

It can be written as a sum of positive squares in only one way, i.e., 18696976 + 4674244 = 4324^2 + 2162^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 23371192 and 23371201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 497237 + ... + 497283.

Almost surely, 2^23371220 is an apocalyptic number.

23371220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23371220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26210541).

23371220 is an abundant number, since it is smaller than the sum of its proper divisors (29049862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23371220 is a wasteful number, since it uses less digits than its factorization.

23371220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 23371220 is about 4834.3789673545. The cubic root of 23371220 is about 285.9085400413.

Multiplying 23371220 by its sum of digits (20), we get a square (467424400 = 21620²).

23371220 divided by its sum of digits (20) gives a square (1168561 = 1081²).

Adding to 23371220 its reverse (2217332), we get a palindrome (25588552).

The spelling of 23371220 in words is "twenty-three million, three hundred seventy-one thousand, two hundred twenty".