18616863028 has 6 divisors (see below), whose sum is σ = 32579510306. Its totient is φ = 9308431512.

The previous prime is 18616862921. The next prime is 18616863037. The reversal of 18616863028 is 82036861681.

It can be written as a sum of positive squares in only one way, i.e., 14566558864 + 4050304164 = 120692^2 + 63642^2 .

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, 2327107875 + ... + 2327107882.

Almost surely, 2^18616863028 is an apocalyptic number.

It is an amenable number.

18616863028 is a deficient number, since it is larger than the sum of its proper divisors (13962647278).

18616863028 is a wasteful number, since it uses less digits than its factorization.

18616863028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4654215761 (or 4654215759 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 49.

The spelling of 18616863028 in words is "eighteen billion, six hundred sixteen million, eight hundred sixty-three thousand, twenty-eight".