20975634 has 24 divisors (see below), whose sum is σ = 45545292. Its totient is φ = 6976800.

The previous prime is 20975627. The next prime is 20975657. The reversal of 20975634 is 43657902.

20975634 is a `hidden beast` number, since 2 + 0 + 97 + 563 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14085009 + 6890625 = 3753^2 + 2625^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10084 + ... + 11984.

Almost surely, 2^20975634 is an apocalyptic number.

20975634 is an abundant number, since it is smaller than the sum of its proper divisors (24569658).

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

20975634 is a wasteful number, since it uses less digits than its factorization.

20975634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522 (or 2519 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 20975634 is about 4579.9163747824. The cubic root of 20975634 is about 275.7856716652.

It can be divided in two parts, 20975 and 634, that added together give a square (21609 = 147²).

The spelling of 20975634 in words is "twenty million, nine hundred seventy-five thousand, six hundred thirty-four".