23509204939 has 16 divisors (see below), whose sum is σ = 25989755904. Its totient is φ = 21086562400.

The previous prime is 23509204937. The next prime is 23509205009. The reversal of 23509204939 is 93940290532.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 23509204939 - 2¹ = 23509204937 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 689094 + ... + 722404.

It is an arithmetic number, because the mean of its divisors is an integer number (1624359744).

Almost surely, 2^23509204939 is an apocalyptic number.

23509204939 is a deficient number, since it is larger than the sum of its proper divisors (2480550965).

23509204939 is a wasteful number, since it uses less digits than its factorization.

23509204939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34178.

The product of its (nonzero) digits is 524880, while the sum is 46.

The spelling of 23509204939 in words is "twenty-three billion, five hundred nine million, two hundred four thousand, nine hundred thirty-nine".