23432220 has 96 divisors (see below), whose sum is σ = 83328000. Its totient is φ = 5355072.

The previous prime is 23432219. The next prime is 23432237. The reversal of 23432220 is 2223432.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 23432193 and 23432202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 681 + ... + 6879.

It is an arithmetic number, because the mean of its divisors is an integer number (868000).

Almost surely, 2^23432220 is an apocalyptic number.

23432220 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 23432220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41664000).

23432220 is an abundant number, since it is smaller than the sum of its proper divisors (59895780).

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

23432220 is a wasteful number, since it uses less digits than its factorization.

23432220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6224 (or 6216 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 23432220 is about 4840.6838359885. The cubic root of 23432220 is about 286.1570689223.

Adding to 23432220 its reverse (2223432), we get a palindrome (25655652).

The spelling of 23432220 in words is "twenty-three million, four hundred thirty-two thousand, two hundred twenty".