20879275 has 24 divisors (see below), whose sum is σ = 27676800. Its totient is φ = 15590400.

The previous prime is 20879251. The next prime is 20879303. The reversal of 20879275 is 57297802.

It is not a de Polignac number, because 20879275 - 2²¹ = 18782123 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22011 + ... + 22939.

It is an arithmetic number, because the mean of its divisors is an integer number (1153200).

Almost surely, 2^20879275 is an apocalyptic number.

20879275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20879275 is a deficient number, since it is larger than the sum of its proper divisors (6797525).

20879275 is a wasteful number, since it uses less digits than its factorization.

20879275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999 (or 994 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 20879275 is about 4569.3845318598. The cubic root of 20879275 is about 275.3627169689.

The spelling of 20879275 in words is "twenty million, eight hundred seventy-nine thousand, two hundred seventy-five".