20992722 has 32 divisors (see below), whose sum is σ = 44675712. Its totient is φ = 6553344.

The previous prime is 20992711. The next prime is 20992747. The reversal of 20992722 is 22729902.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27883 + ... + 28625.

It is an arithmetic number, because the mean of its divisors is an integer number (1396116).

Almost surely, 2^20992722 is an apocalyptic number.

20992722 is an abundant number, since it is smaller than the sum of its proper divisors (23682990).

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

20992722 is a wasteful number, since it uses less digits than its factorization.

20992722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 20992722 is about 4581.7815312387. The cubic root of 20992722 is about 275.8605418123.

The spelling of 20992722 in words is "twenty million, nine hundred ninety-two thousand, seven hundred twenty-two".