20875460 has 12 divisors (see below), whose sum is σ = 43838508. Its totient is φ = 8350176.

The previous prime is 20875453. The next prime is 20875483. The reversal of 20875460 is 6457802.

It can be written as a sum of positive squares in 2 ways, for example, as 7929856 + 12945604 = 2816^2 + 3598^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521867 + ... + 521906.

It is an arithmetic number, because the mean of its divisors is an integer number (3653209).

Almost surely, 2^20875460 is an apocalyptic number.

20875460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20875460 is an abundant number, since it is smaller than the sum of its proper divisors (22963048).

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

20875460 is a wasteful number, since it uses less digits than its factorization.

20875460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043782 (or 1043780 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 20875460 is about 4568.9670605072. The cubic root of 20875460 is about 275.3459447908.

The spelling of 20875460 in words is "twenty million, eight hundred seventy-five thousand, four hundred sixty".