20901258 has 24 divisors (see below), whose sum is σ = 51755808. Its totient is φ = 5971752.

The previous prime is 20901247. The next prime is 20901259. The reversal of 20901258 is 85210902.

It is not an unprimeable number, because it can be changed into a prime (20901259) 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, 82816 + ... + 83067.

It is an arithmetic number, because the mean of its divisors is an integer number (2156492).

Almost surely, 2^20901258 is an apocalyptic number.

20901258 is an abundant number, since it is smaller than the sum of its proper divisors (30854550).

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

20901258 is a wasteful number, since it uses less digits than its factorization.

20901258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165898 (or 165895 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 20901258 is about 4571.7893652267. The cubic root of 20901258 is about 275.4593227405.

The spelling of 20901258 in words is "twenty million, nine hundred one thousand, two hundred fifty-eight".