20146904 has 16 divisors (see below), whose sum is σ = 39997800. Its totient is φ = 9480832.

The previous prime is 20146831. The next prime is 20146927. The reversal of 20146904 is 40964102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73934 + ... + 74205.

Almost surely, 2^20146904 is an apocalyptic number.

It is an amenable number.

20146904 is a deficient number, since it is larger than the sum of its proper divisors (19850896).

20146904 is a wasteful number, since it uses less digits than its factorization.

20146904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148162 (or 148158 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20146904 is about 4488.5302717036. The cubic root of 20146904 is about 272.1047390747.

The spelling of 20146904 in words is "twenty million, one hundred forty-six thousand, nine hundred four".