20702621265872 has 80 divisors (see below), whose sum is σ = 49399665302400. Its totient is φ = 8184759768576.

The previous prime is 20702621265853. The next prime is 20702621265881. The reversal of 20702621265872 is 27856212620702.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20702621265872.

It is a congruent number.

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, 2334338 + ... + 6845025.

It is an arithmetic number, because the mean of its divisors is an integer number (617495816280).

Almost surely, 2^{20702621265872} is an apocalyptic number.

It is an amenable number.

20702621265872 is an abundant number, since it is smaller than the sum of its proper divisors (28697044036528).

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

20702621265872 is a wasteful number, since it uses less digits than its factorization.

20702621265872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9180940 (or 9180934 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 50.

The spelling of 20702621265872 in words is "twenty trillion, seven hundred two billion, six hundred twenty-one million, two hundred sixty-five thousand, eight hundred seventy-two".