23509138032 has 120 divisors (see below), whose sum is σ = 68397288960. Its totient is φ = 7817135040.

The previous prime is 23509138031. The next prime is 23509138073. The reversal of 23509138032 is 23083190532.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23509138031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1621857 + ... + 1636287.

It is an arithmetic number, because the mean of its divisors is an integer number (569977408).

Almost surely, 2^23509138032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23509138032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34198644480).

23509138032 is an abundant number, since it is smaller than the sum of its proper divisors (44888150928).

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

23509138032 is a wasteful number, since it uses less digits than its factorization.

23509138032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14873 (or 14855 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 23509138032 in words is "twenty-three billion, five hundred nine million, one hundred thirty-eight thousand, thirty-two".