18638863002 has 48 divisors (see below), whose sum is σ = 42770737152. Its totient is φ = 5845983360.

The previous prime is 18638862989. The next prime is 18638863147. The reversal of 18638863002 is 20036883681.

18638863002 is a `hidden beast` number, since 1 + 8 + 6 + 3 + 8 + 8 + 630 + 0 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2202343 + ... + 2210789.

It is an arithmetic number, because the mean of its divisors is an integer number (891057024).

Almost surely, 2^18638863002 is an apocalyptic number.

18638863002 is an abundant number, since it is smaller than the sum of its proper divisors (24131874150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18638863002 is a wasteful number, since it uses less digits than its factorization.

18638863002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15683 (or 15680 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 18638863002 in words is "eighteen billion, six hundred thirty-eight million, eight hundred sixty-three thousand, two".