23420320 has 96 divisors (see below), whose sum is σ = 69019776. Its totient is φ = 7296000.

The previous prime is 23420281. The next prime is 23420323. The reversal of 23420320 is 2302432.

It is a super-2 number, since 2×23420320² = 1097022777804800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 23420294 and 23420303.

It is not an unprimeable number, because it can be changed into a prime (23420323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11370 + ... + 13270.

It is an arithmetic number, because the mean of its divisors is an integer number (718956).

Almost surely, 2^23420320 is an apocalyptic number.

23420320 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 23420320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34509888).

23420320 is an abundant number, since it is smaller than the sum of its proper divisors (45599456).

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

23420320 is a wasteful number, since it uses less digits than its factorization.

23420320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1934 (or 1926 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 23420320 is about 4839.4545147155. The cubic root of 23420320 is about 286.1086193127.

Adding to 23420320 its reverse (2302432), we get a palindrome (25722752).

The spelling of 23420320 in words is "twenty-three million, four hundred twenty thousand, three hundred twenty".