20955264 has 128 divisors (see below), whose sum is σ = 62717760. Its totient is φ = 6195200.

The previous prime is 20955251. The next prime is 20955293. The reversal of 20955264 is 46255902.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

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, 511084 + ... + 511124.

Almost surely, 2^20955264 is an apocalyptic number.

20955264 is a gapful number since it is divisible by the number (24) 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 20955264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31358880).

20955264 is an abundant number, since it is smaller than the sum of its proper divisors (41762496).

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

20955264 is an equidigital number, since it uses as much as digits as its factorization.

20955264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 20955264 is about 4577.6919948813. The cubic root of 20955264 is about 275.6963684666.

The spelling of 20955264 in words is "twenty million, nine hundred fifty-five thousand, two hundred sixty-four".