20504308 has 24 divisors (see below), whose sum is σ = 39259584. Its totient is φ = 9292800.

The previous prime is 20504221. The next prime is 20504353. The reversal of 20504308 is 80340502.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent 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, 27841 + ... + 28567.

It is an arithmetic number, because the mean of its divisors is an integer number (1635816).

Almost surely, 2^20504308 is an apocalyptic number.

It is an amenable number.

20504308 is a deficient number, since it is larger than the sum of its proper divisors (18755276).

20504308 is a wasteful number, since it uses less digits than its factorization.

20504308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383 (or 1381 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20504308 is about 4528.1682830920. The cubic root of 20504308 is about 273.7043537105.

The spelling of 20504308 in words is "twenty million, five hundred four thousand, three hundred eight".