30920867712 has 96 divisors (see below), whose sum is σ = 101689189680. Its totient is φ = 8834531328.

The previous prime is 30920867711. The next prime is 30920867759. The reversal of 30920867712 is 21776802903.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×30920867712² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30920867711) 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, 1909153 + ... + 1925280.

Almost surely, 2^30920867712 is an apocalyptic number.

30920867712 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30920867712 is an abundant number, since it is smaller than the sum of its proper divisors (70768321968).

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

30920867712 is a wasteful number, since it uses less digits than its factorization.

30920867712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3834460 (or 3834445 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 30920867712 in words is "thirty billion, nine hundred twenty million, eight hundred sixty-seven thousand, seven hundred twelve".