18772869328 has 10 divisors (see below), whose sum is σ = 36372434354. Its totient is φ = 9386434656.

The previous prime is 18772869319. The next prime is 18772869337. The reversal of 18772869328 is 82396827781.

It is an interprime number because it is at equal distance from previous prime (18772869319) and next prime (18772869337).

It can be written as a sum of positive squares in only one way, i.e., 10210698304 + 8562171024 = 101048^2 + 92532^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586652151 + ... + 586652182.

Almost surely, 2^18772869328 is an apocalyptic number.

It is an amenable number.

18772869328 is a deficient number, since it is larger than the sum of its proper divisors (17599565026).

18772869328 is a wasteful number, since it uses less digits than its factorization.

18772869328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173304341 (or 1173304335 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 61.

The spelling of 18772869328 in words is "eighteen billion, seven hundred seventy-two million, eight hundred sixty-nine thousand, three hundred twenty-eight".