20846208520 has 32 divisors (see below), whose sum is σ = 49663027800. Its totient is φ = 7847984128.

The previous prime is 20846208457. The next prime is 20846208527. The reversal of 20846208520 is 2580264802.

It can be written as a sum of positive squares in 4 ways, for example, as 20764233604 + 81974916 = 144098^2 + 9054^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20846208520.

It is not an unprimeable number, because it can be changed into a prime (20846208527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15327415 + ... + 15328774.

Almost surely, 2^20846208520 is an apocalyptic number.

20846208520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20846208520 is an abundant number, since it is smaller than the sum of its proper divisors (28816819280).

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

20846208520 is a wasteful number, since it uses less digits than its factorization.

20846208520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30656217 (or 30656213 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 37.

The spelling of 20846208520 in words is "twenty billion, eight hundred forty-six million, two hundred eight thousand, five hundred twenty".