20018502104 has 16 divisors (see below), whose sum is σ = 38828991600. Its totient is φ = 9664104352.

The previous prime is 20018502073. The next prime is 20018502113. The reversal of 20018502104 is 40120581002.

It is a self number, because there is not a number n which added to its sum of digits gives 20018502104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43143092 + ... + 43143555.

It is an arithmetic number, because the mean of its divisors is an integer number (2426811975).

Almost surely, 2^20018502104 is an apocalyptic number.

It is an amenable number.

20018502104 is a deficient number, since it is larger than the sum of its proper divisors (18810489496).

20018502104 is a wasteful number, since it uses less digits than its factorization.

20018502104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86286682 (or 86286678 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The spelling of 20018502104 in words is "twenty billion, eighteen million, five hundred two thousand, one hundred four".