18887930394 has 16 divisors (see below), whose sum is σ = 37802313120. Its totient is φ = 6291568080.

The previous prime is 18887930371. The next prime is 18887930423. The reversal of 18887930394 is 49303978881.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1092892 + ... + 1110039.

It is an arithmetic number, because the mean of its divisors is an integer number (2362644570).

Almost surely, 2^18887930394 is an apocalyptic number.

18887930394 is an abundant number, since it is smaller than the sum of its proper divisors (18914382726).

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

18887930394 is a wasteful number, since it uses less digits than its factorization.

18887930394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204365.

The product of its (nonzero) digits is 10450944, while the sum is 60.

The spelling of 18887930394 in words is "eighteen billion, eight hundred eighty-seven million, nine hundred thirty thousand, three hundred ninety-four".