20992544 has 24 divisors (see below), whose sum is σ = 41722128. Its totient is φ = 10396480.

The previous prime is 20992529. The next prime is 20992553. The reversal of 20992544 is 44529902.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359 + ... + 6489.

It is an arithmetic number, because the mean of its divisors is an integer number (1738422).

Almost surely, 2^20992544 is an apocalyptic number.

It is an amenable number.

20992544 is a deficient number, since it is larger than the sum of its proper divisors (20729584).

20992544 is a wasteful number, since it uses less digits than its factorization.

20992544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6248 (or 6240 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 20992544 is about 4581.7621064390. The cubic root of 20992544 is about 275.8597621244.

The spelling of 20992544 in words is "twenty million, nine hundred ninety-two thousand, five hundred forty-four".