18438694930 has 16 divisors (see below), whose sum is σ = 33192607680. Its totient is φ = 7374820912.

The previous prime is 18438694891. The next prime is 18438694979. The reversal of 18438694930 is 3949683481.

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, 45117 + ... + 197263.

It is an arithmetic number, because the mean of its divisors is an integer number (2074537980).

Almost surely, 2^18438694930 is an apocalyptic number.

18438694930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18438694930 is a deficient number, since it is larger than the sum of its proper divisors (14753912750).

18438694930 is a wasteful number, since it uses less digits than its factorization.

18438694930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164273.

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 18438694930 in words is "eighteen billion, four hundred thirty-eight million, six hundred ninety-four thousand, nine hundred thirty".