9920918 has 16 divisors (see below), whose sum is σ = 17287584. Its totient is φ = 4181760.

The previous prime is 9920903. The next prime is 9920923. The reversal of 9920918 is 8190299.

9920918 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 2×9920918² = 196849227925448, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4955 + ... + 6662.

It is an arithmetic number, because the mean of its divisors is an integer number (1080474).

Almost surely, 2^9920918 is an apocalyptic number.

9920918 is a deficient number, since it is larger than the sum of its proper divisors (7366666).

9920918 is a wasteful number, since it uses less digits than its factorization.

9920918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11687.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 9920918 is about 3149.7488788791. The cubic root of 9920918 is about 214.8740419600.

The spelling of 9920918 in words is "nine million, nine hundred twenty thousand, nine hundred eighteen".