20552736 has 24 divisors (see below), whose sum is σ = 53951184. Its totient is φ = 6850880.

The previous prime is 20552717. The next prime is 20552759. The reversal of 20552736 is 63725502.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

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, 106950 + ... + 107141.

It is an arithmetic number, because the mean of its divisors is an integer number (2247966).

Almost surely, 2^20552736 is an apocalyptic number.

It is an amenable number.

20552736 is an abundant number, since it is smaller than the sum of its proper divisors (33398448).

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

20552736 is a wasteful number, since it uses less digits than its factorization.

20552736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214104 (or 214096 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 20552736 is about 4533.5125454773. The cubic root of 20552736 is about 273.9196667190.

The spelling of 20552736 in words is "twenty million, five hundred fifty-two thousand, seven hundred thirty-six".