20504706 has 16 divisors (see below), whose sum is σ = 41224224. Its totient is φ = 6799104.

The previous prime is 20504681. The next prime is 20504713. The reversal of 20504706 is 60740502.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7696 + ... + 10011.

It is an arithmetic number, because the mean of its divisors is an integer number (2576514).

Almost surely, 2^20504706 is an apocalyptic number.

20504706 is an abundant number, since it is smaller than the sum of its proper divisors (20719518).

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

20504706 is a wasteful number, since it uses less digits than its factorization.

20504706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17905.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20504706 is about 4528.2122300087. The cubic root of 20504706 is about 273.7061246169.

The spelling of 20504706 in words is "twenty million, five hundred four thousand, seven hundred six".