20530806072 has 64 divisors (see below), whose sum is σ = 58876032000. Its totient is φ = 5844286080.

The previous prime is 20530806061. The next prime is 20530806073. The reversal of 20530806072 is 27060803502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530806073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179947 + ... + 271002.

It is an arithmetic number, because the mean of its divisors is an integer number (919938000).

Almost surely, 2^20530806072 is an apocalyptic number.

It is an amenable number.

20530806072 is an abundant number, since it is smaller than the sum of its proper divisors (38345225928).

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

20530806072 is a wasteful number, since it uses less digits than its factorization.

20530806072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451236 (or 451232 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The spelling of 20530806072 in words is "twenty billion, five hundred thirty million, eight hundred six thousand, seventy-two".