18627937825 has 24 divisors (see below), whose sum is σ = 26896546368. Its totient is φ = 12532428480.

The previous prime is 18627937771. The next prime is 18627937829. The reversal of 18627937825 is 52873972681.

It is a happy number.

It is not a de Polignac number, because 18627937825 - 2⁹ = 18627937313 is a prime.

It is a super-2 number, since 2×18627937825² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18627937825.

It is not an unprimeable number, because it can be changed into a prime (18627937829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 994927 + ... + 1013476.

It is an arithmetic number, because the mean of its divisors is an integer number (1120689432).

Almost surely, 2^18627937825 is an apocalyptic number.

It is an amenable number.

18627937825 is a deficient number, since it is larger than the sum of its proper divisors (8268608543).

18627937825 is a wasteful number, since it uses less digits than its factorization.

18627937825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008473 (or 2008468 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 58.

The spelling of 18627937825 in words is "eighteen billion, six hundred twenty-seven million, nine hundred thirty-seven thousand, eight hundred twenty-five".