20136208872 has 64 divisors (see below), whose sum is σ = 55366375680. Its totient is φ = 6063927552.

The previous prime is 20136208817. The next prime is 20136208891. The reversal of 20136208872 is 27880263102.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 20136208872.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 671923 + ... + 701250.

It is an arithmetic number, because the mean of its divisors is an integer number (865099620).

Almost surely, 2^20136208872 is an apocalyptic number.

It is an amenable number.

20136208872 is an abundant number, since it is smaller than the sum of its proper divisors (35230166808).

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

20136208872 is a wasteful number, since it uses less digits than its factorization.

20136208872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373242 (or 1373238 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 20136208872 in words is "twenty billion, one hundred thirty-six million, two hundred eight thousand, eight hundred seventy-two".