30921466913 has 12 divisors (see below), whose sum is σ = 32834842128. Its totient is φ = 29114247960.

The previous prime is 30921466907. The next prime is 30921466931. The reversal of 30921466913 is 31966412903.

It is not a de Polignac number, because 30921466913 - 2²² = 30917272609 is a prime.

It is a super-2 number, since 2×30921466913² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30921466903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203903 + ... + 321588.

It is an arithmetic number, because the mean of its divisors is an integer number (2736236844).

Almost surely, 2^30921466913 is an apocalyptic number.

It is an amenable number.

30921466913 is a deficient number, since it is larger than the sum of its proper divisors (1913375215).

30921466913 is a wasteful number, since it uses less digits than its factorization.

30921466913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525692 (or 525673 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 44.

The spelling of 30921466913 in words is "thirty billion, nine hundred twenty-one million, four hundred sixty-six thousand, nine hundred thirteen".