20500684 has 6 divisors (see below), whose sum is σ = 35876204. Its totient is φ = 10250340.

The previous prime is 20500681. The next prime is 20500687. The reversal of 20500684 is 48600502.

It is an interprime number because it is at equal distance from previous prime (20500681) and next prime (20500687).

It is not an unprimeable number, because it can be changed into a prime (20500681) 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, 2562582 + ... + 2562589.

Almost surely, 2^20500684 is an apocalyptic number.

It is an amenable number.

20500684 is a deficient number, since it is larger than the sum of its proper divisors (15375520).

20500684 is a wasteful number, since it uses less digits than its factorization.

20500684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5125175 (or 5125173 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20500684 is about 4527.7681036025. The cubic root of 20500684 is about 273.6882276193.

The spelling of 20500684 in words is "twenty million, five hundred thousand, six hundred eighty-four".