20992960 has 84 divisors (see below), whose sum is σ = 53336952. Its totient is φ = 7868416.

The previous prime is 20992927. The next prime is 20992969. The reversal of 20992960 is 6929902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20992969) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92367 + ... + 92593.

Almost surely, 2^20992960 is an apocalyptic number.

20992960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20992960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26668476).

20992960 is an abundant number, since it is smaller than the sum of its proper divisors (32343992).

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

20992960 is a wasteful number, since it uses less digits than its factorization.

20992960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 20992960 is about 4581.8075035951. The cubic root of 20992960 is about 275.8615843095.

It can be divided in two parts, 20992 and 960, that added together give a cube (21952 = 28³).

The spelling of 20992960 in words is "twenty million, nine hundred ninety-two thousand, nine hundred sixty".