20620587520 has 160 divisors (see below), whose sum is σ = 56048287680. Its totient is φ = 7212810240.

The previous prime is 20620587511. The next prime is 20620587593. The reversal of 20620587520 is 2578502602.

It is a tau number, because it is divible by the number of its divisors (160).

It is a self number, because there is not a number n which added to its sum of digits gives 20620587520.

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, 616015 + ... + 648625.

It is an arithmetic number, because the mean of its divisors is an integer number (350301798).

Almost surely, 2^20620587520 is an apocalyptic number.

20620587520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20620587520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28024143840).

20620587520 is an abundant number, since it is smaller than the sum of its proper divisors (35427700160).

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

20620587520 is a wasteful number, since it uses less digits than its factorization.

20620587520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32666 (or 32650 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 20620587520 in words is "twenty billion, six hundred twenty million, five hundred eighty-seven thousand, five hundred twenty".