18738688552 has 16 divisors (see below), whose sum is σ = 35136816660. Its totient is φ = 9368870784.

The previous prime is 18738688543. The next prime is 18738688567. The reversal of 18738688552 is 25588683781.

It can be written as a sum of positive squares in 2 ways, for example, as 16623976356 + 2114712196 = 128934^2 + 45986^2 .

It is a super-2 number, since 2×18738688552² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154308 + ... + 247564.

Almost surely, 2^18738688552 is an apocalyptic number.

It is an amenable number.

18738688552 is a deficient number, since it is larger than the sum of its proper divisors (16398128108).

18738688552 is a wasteful number, since it uses less digits than its factorization.

18738688552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118380 (or 118376 counting only the distinct ones).

The product of its digits is 25804800, while the sum is 61.

The spelling of 18738688552 in words is "eighteen billion, seven hundred thirty-eight million, six hundred eighty-eight thousand, five hundred fifty-two".