20624704 has 14 divisors (see below), whose sum is σ = 40927274. Its totient is φ = 10312320.

The previous prime is 20624701. The next prime is 20624707. The reversal of 20624704 is 40742602.

It is an interprime number because it is at equal distance from previous prime (20624701) and next prime (20624707).

It can be written as a sum of positive squares in only one way, i.e., 17239104 + 3385600 = 4152^2 + 1840^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20624701) by changing a digit.

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 as a sum of consecutive naturals, namely, 161067 + ... + 161194.

Almost surely, 2^20624704 is an apocalyptic number.

It is an amenable number.

20624704 is a deficient number, since it is larger than the sum of its proper divisors (20302570).

20624704 is an equidigital number, since it uses as much as digits as its factorization.

20624704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322273 (or 322263 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 20624704 is about 4541.4429425019. The cubic root of 20624704 is about 274.2390156939.

The spelling of 20624704 in words is "twenty million, six hundred twenty-four thousand, seven hundred four".