30193996638 has 24 divisors (see below), whose sum is σ = 65390551128. Its totient is φ = 9290460192.

The previous prime is 30193996601. The next prime is 30193996669. The reversal of 30193996638 is 83669939103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14887545 + ... + 14889572.

It is an arithmetic number, because the mean of its divisors is an integer number (2724606297).

Almost surely, 2^30193996638 is an apocalyptic number.

30193996638 is an abundant number, since it is smaller than the sum of its proper divisors (35196554490).

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

30193996638 is a wasteful number, since it uses less digits than its factorization.

30193996638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29777148 (or 29777135 counting only the distinct ones).

The product of its (nonzero) digits is 5668704, while the sum is 57.

The spelling of 30193996638 in words is "thirty billion, one hundred ninety-three million, nine hundred ninety-six thousand, six hundred thirty-eight".