20324520520 has 32 divisors (see below), whose sum is σ = 45800260920. Its totient is φ = 8117347840.

The previous prime is 20324520467. The next prime is 20324520523. The reversal of 20324520520 is 2502542302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18759685156 + 1564835364 = 136966^2 + 39558^2 .

It is a super-2 number, since 2×20324520520² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20324520523) 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, 362941 + ... + 415180.

Almost surely, 2^20324520520 is an apocalyptic number.

20324520520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20324520520 is an abundant number, since it is smaller than the sum of its proper divisors (25475740400).

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

20324520520 is a wasteful number, since it uses less digits than its factorization.

20324520520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778785 (or 778781 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The spelling of 20324520520 in words is "twenty billion, three hundred twenty-four million, five hundred twenty thousand, five hundred twenty".