23509204938 has 20 divisors (see below), whose sum is σ = 52678033650. Its totient is φ = 7836401592.

The previous prime is 23509204937. The next prime is 23509205009. The reversal of 23509204938 is 83940290532.

It is a happy number.

23509204938 is a `hidden beast` number, since 2 + 350 + 9 + 204 + 93 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21900152169 + 1609052769 = 147987^2 + 40113^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23509204893 and 23509204902.

It is not an unprimeable number, because it can be changed into a prime (23509204937) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 72559113 + ... + 72559436.

Almost surely, 2^23509204938 is an apocalyptic number.

23509204938 is an abundant number, since it is smaller than the sum of its proper divisors (29168828712).

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

23509204938 is a wasteful number, since it uses less digits than its factorization.

23509204938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145118563 (or 145118554 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 23509204938 in words is "twenty-three billion, five hundred nine million, two hundred four thousand, nine hundred thirty-eight".