920991912 has 16 divisors (see below), whose sum is σ = 2302479840. Its totient is φ = 306997296.

The previous prime is 920991887. The next prime is 920991913. The reversal of 920991912 is 219199029.

920991912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×920991912² = 1696452203938831488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (920991913) 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, 19187308 + ... + 19187355.

It is an arithmetic number, because the mean of its divisors is an integer number (143904990).

Almost surely, 2^920991912 is an apocalyptic number.

It is an amenable number.

920991912 is an abundant number, since it is smaller than the sum of its proper divisors (1381487928).

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

920991912 is a wasteful number, since it uses less digits than its factorization.

920991912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38374672 (or 38374668 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 42.

The square root of 920991912 is about 30347.8485563639. The cubic root of 920991912 is about 972.9382378222.

The spelling of 920991912 in words is "nine hundred twenty million, nine hundred ninety-one thousand, nine hundred twelve".