20975076 has 36 divisors (see below), whose sum is σ = 56140812. Its totient is φ = 6580224.

The previous prime is 20975063. The next prime is 20975081. The reversal of 20975076 is 67057902.

20975076 = T₄₈₆ + T₄₈₇ + ... + T₆₂₁.

It can be written as a sum of positive squares in 2 ways, for example, as 17842176 + 3132900 = 4224^2 + 1770^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20975076.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16525 + ... + 17748.

It is an arithmetic number, because the mean of its divisors is an integer number (1559467).

Almost surely, 2^20975076 is an apocalyptic number.

It is an amenable number.

20975076 is an abundant number, since it is smaller than the sum of its proper divisors (35165736).

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

20975076 is a wasteful number, since it uses less digits than its factorization.

20975076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34300 (or 34295 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 20975076 is about 4579.8554562344. The cubic root of 20975076 is about 275.7832261330.

The spelling of 20975076 in words is "twenty million, nine hundred seventy-five thousand, seventy-six".