20624402 has 8 divisors (see below), whose sum is σ = 31243212. Its totient is φ = 10210000.

The previous prime is 20624381. The next prime is 20624447. The reversal of 20624402 is 20442602.

It can be written as a sum of positive squares in 2 ways, for example, as 20620681 + 3721 = 4541^2 + 61^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 50849 + ... + 51252.

Almost surely, 2^20624402 is an apocalyptic number.

20624402 is a deficient number, since it is larger than the sum of its proper divisors (10618810).

20624402 is a wasteful number, since it uses less digits than its factorization.

20624402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102204.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 20624402 is about 4541.4096930359. The cubic root of 20624402 is about 274.2376771602.

The spelling of 20624402 in words is "twenty million, six hundred twenty-four thousand, four hundred two".