18787444925 has 12 divisors (see below), whose sum is σ = 23300086080. Its totient is φ = 15027598320.

The previous prime is 18787444919. The next prime is 18787444927. The reversal of 18787444925 is 52944478781.

It is not a de Polignac number, because 18787444925 - 2⁴ = 18787444909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18787444927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113516 + ... + 224634.

It is an arithmetic number, because the mean of its divisors is an integer number (1941673840).

Almost surely, 2^18787444925 is an apocalyptic number.

It is an amenable number.

18787444925 is a deficient number, since it is larger than the sum of its proper divisors (4512641155).

18787444925 is a wasteful number, since it uses less digits than its factorization.

18787444925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117892 (or 117887 counting only the distinct ones).

The product of its digits is 18063360, while the sum is 59.

The spelling of 18787444925 in words is "eighteen billion, seven hundred eighty-seven million, four hundred forty-four thousand, nine hundred twenty-five".