20955120 has 40 divisors (see below), whose sum is σ = 64961616. Its totient is φ = 5587968.

The previous prime is 20955113. The next prime is 20955133. The reversal of 20955120 is 2155902.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43417 + ... + 43896.

Almost surely, 2^20955120 is an apocalyptic number.

20955120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20955120 is an abundant number, since it is smaller than the sum of its proper divisors (44006496).

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

20955120 is a wasteful number, since it uses less digits than its factorization.

20955120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87329 (or 87323 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 20955120 is about 4577.6762664042. The cubic root of 20955120 is about 275.6957369567.

The spelling of 20955120 in words is "twenty million, nine hundred fifty-five thousand, one hundred twenty".