30886940721 has 192 divisors, whose sum is σ = 56538746880. Its totient is φ = 14814213120.

The previous prime is 30886940713. The next prime is 30886940743. The reversal of 30886940721 is 12704968803.

It is not a de Polignac number, because 30886940721 - 2³ = 30886940713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30886940921) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 113973816 + ... + 113974086.

It is an arithmetic number, because the mean of its divisors is an integer number (294472640).

Almost surely, 2^30886940721 is an apocalyptic number.

It is an amenable number.

30886940721 is a deficient number, since it is larger than the sum of its proper divisors (25651806159).

30886940721 is a wasteful number, since it uses less digits than its factorization.

30886940721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 30886940721 in words is "thirty billion, eight hundred eighty-six million, nine hundred forty thousand, seven hundred twenty-one".