30921945916 has 12 divisors (see below), whose sum is σ = 55575930088. Its totient is φ = 15043108752.

The previous prime is 30921945911. The next prime is 30921945931. The reversal of 30921945916 is 61954912903.

It is a super-4 number, since 4×30921945916⁴ (a number of 43 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 30921945916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30921945911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104465886 + ... + 104466181.

Almost surely, 2^30921945916 is an apocalyptic number.

It is an amenable number.

30921945916 is a deficient number, since it is larger than the sum of its proper divisors (24653984172).

30921945916 is a wasteful number, since it uses less digits than its factorization.

30921945916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208932108 (or 208932106 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 49.

The spelling of 30921945916 in words is "thirty billion, nine hundred twenty-one million, nine hundred forty-five thousand, nine hundred sixteen".