20922916 has 48 divisors (see below), whose sum is σ = 44561664. Its totient is φ = 8401536.

The previous prime is 20922911. The next prime is 20922931. The reversal of 20922916 is 61922902.

It is not an unprimeable number, because it can be changed into a prime (20922911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33826 + ... + 34438.

It is an arithmetic number, because the mean of its divisors is an integer number (928368).

Almost surely, 2^20922916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20922916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22280832).

20922916 is an abundant number, since it is smaller than the sum of its proper divisors (23638748).

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

20922916 is a wasteful number, since it uses less digits than its factorization.

20922916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700 (or 698 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 20922916 is about 4574.1574087475. The cubic root of 20922916 is about 275.5544340581.

The spelling of 20922916 in words is "twenty million, nine hundred twenty-two thousand, nine hundred sixteen".