18931229873025 has 12 divisors (see below), whose sum is σ = 31299633390192. Its totient is φ = 10096655932240.

The previous prime is 18931229872967. The next prime is 18931229873041. The reversal of 18931229873025 is 52037892213981.

It is not a de Polignac number, because 18931229873025 - 2¹¹ = 18931229870977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18931229873025.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126208199079 + ... + 126208199228.

It is an arithmetic number, because the mean of its divisors is an integer number (2608302782516).

Almost surely, 2^{18931229873025} is an apocalyptic number.

18931229873025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18931229873025 is a deficient number, since it is larger than the sum of its proper divisors (12368403517167).

18931229873025 is a wasteful number, since it uses less digits than its factorization.

18931229873025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252416398320 (or 252416398315 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 60.

The spelling of 18931229873025 in words is "eighteen trillion, nine hundred thirty-one billion, two hundred twenty-nine million, eight hundred seventy-three thousand, twenty-five".