20684124902 has 12 divisors (see below), whose sum is σ = 36091687500. Its totient is φ = 8864624916.

The previous prime is 20684124899. The next prime is 20684124991. The reversal of 20684124902 is 20942148602.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105531152 + ... + 105531347.

It is an arithmetic number, because the mean of its divisors is an integer number (3007640625).

Almost surely, 2^20684124902 is an apocalyptic number.

20684124902 is a deficient number, since it is larger than the sum of its proper divisors (15407562598).

20684124902 is a wasteful number, since it uses less digits than its factorization.

20684124902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211062515 (or 211062508 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The spelling of 20684124902 in words is "twenty billion, six hundred eighty-four million, one hundred twenty-four thousand, nine hundred two".