20513232239 has 8 divisors (see below), whose sum is σ = 21176937600. Its totient is φ = 19849651200.

The previous prime is 20513232191. The next prime is 20513232247. The reversal of 20513232239 is 93223231502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20513232239 - 2³² = 16218264943 is a prime.

It is a super-2 number, since 2×20513232239² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20513232139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398879 + ... + 447359.

It is an arithmetic number, because the mean of its divisors is an integer number (2647117200).

Almost surely, 2^20513232239 is an apocalyptic number.

20513232239 is a deficient number, since it is larger than the sum of its proper divisors (663705361).

20513232239 is a wasteful number, since it uses less digits than its factorization.

20513232239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62161.

The product of its (nonzero) digits is 19440, while the sum is 32.

The spelling of 20513232239 in words is "twenty billion, five hundred thirteen million, two hundred thirty-two thousand, two hundred thirty-nine".