18709988622725 has 6 divisors (see below), whose sum is σ = 23200385892210. Its totient is φ = 14967990898160.

The previous prime is 18709988622667. The next prime is 18709988622733. The reversal of 18709988622725 is 52722688990781.

It can be written as a sum of positive squares in 3 ways, for example, as 252808845601 + 18457179777124 = 502801^2 + 4296182^2 .

It is not a de Polignac number, because 18709988622725 - 2⁸ = 18709988622469 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 374199772430 + ... + 374199772479.

It is an arithmetic number, because the mean of its divisors is an integer number (3866730982035).

Almost surely, 2^{18709988622725} is an apocalyptic number.

It is an amenable number.

18709988622725 is a deficient number, since it is larger than the sum of its proper divisors (4490397269485).

18709988622725 is an equidigital number, since it uses as much as digits as its factorization.

18709988622725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748399544919 (or 748399544914 counting only the distinct ones).

The product of its (nonzero) digits is 487710720, while the sum is 74.

The spelling of 18709988622725 in words is "eighteen trillion, seven hundred nine billion, nine hundred eighty-eight million, six hundred twenty-two thousand, seven hundred twenty-five".