20992750 has 32 divisors (see below), whose sum is σ = 39660192. Its totient is φ = 8320000.

The previous prime is 20992747. The next prime is 20992757. The reversal of 20992750 is 5729902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20992757) 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, 32430 + ... + 33070.

It is an arithmetic number, because the mean of its divisors is an integer number (1239381).

Almost surely, 2^20992750 is an apocalyptic number.

20992750 is a deficient number, since it is larger than the sum of its proper divisors (18667442).

20992750 is a wasteful number, since it uses less digits than its factorization.

20992750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789 (or 779 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 20992750 is about 4581.7845868177. The cubic root of 20992750 is about 275.8606644594.

The spelling of 20992750 in words is "twenty million, nine hundred ninety-two thousand, seven hundred fifty".