20324517520 has 20 divisors (see below), whose sum is σ = 47254503420. Its totient is φ = 8129806976.

The previous prime is 20324517511. The next prime is 20324517541. The reversal of 20324517520 is 2571542302.

It can be written as a sum of positive squares in 2 ways, for example, as 9548416656 + 10776100864 = 97716^2 + 103808^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127028155 + ... + 127028314.

It is an arithmetic number, because the mean of its divisors is an integer number (2362725171).

Almost surely, 2^20324517520 is an apocalyptic number.

20324517520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20324517520 is an abundant number, since it is smaller than the sum of its proper divisors (26929985900).

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

20324517520 is a wasteful number, since it uses less digits than its factorization.

20324517520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254056482 (or 254056476 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The spelling of 20324517520 in words is "twenty billion, three hundred twenty-four million, five hundred seventeen thousand, five hundred twenty".