20552785 has 16 divisors (see below), whose sum is σ = 27279360. Its totient is φ = 14739840.

The previous prime is 20552773. The next prime is 20552801. The reversal of 20552785 is 58725502.

It is not a de Polignac number, because 20552785 - 2²³ = 12164177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20552785.

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, 1456 + ... + 6574.

It is an arithmetic number, because the mean of its divisors is an integer number (1704960).

Almost surely, 2^20552785 is an apocalyptic number.

It is an amenable number.

20552785 is a deficient number, since it is larger than the sum of its proper divisors (6726575).

20552785 is a wasteful number, since it uses less digits than its factorization.

20552785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5208.

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 20552785 is about 4533.5179496722. The cubic root of 20552785 is about 273.9198844038.

The spelling of 20552785 in words is "twenty million, five hundred fifty-two thousand, seven hundred eighty-five".