23153520 has 160 divisors (see below), whose sum is σ = 79619904. Its totient is φ = 5529600.

The previous prime is 23153509. The next prime is 23153531. The reversal of 23153520 is 2535132.

It is an interprime number because it is at equal distance from previous prime (23153509) and next prime (23153531).

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, 127830 + ... + 128010.

Almost surely, 2^23153520 is an apocalyptic number.

23153520 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 23153520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39809952).

23153520 is an abundant number, since it is smaller than the sum of its proper divisors (56466384).

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

23153520 is a wasteful number, since it uses less digits than its factorization.

23153520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 23153520 is about 4811.8104700830. The cubic root of 23153520 is about 285.0180351776.

Adding to 23153520 its reverse (2535132), we get a palindrome (25688652).

The spelling of 23153520 in words is "twenty-three million, one hundred fifty-three thousand, five hundred twenty".