20012032520 has 16 divisors (see below), whose sum is σ = 45027073260. Its totient is φ = 8004812992.

The previous prime is 20012032519. The next prime is 20012032571. The reversal of 20012032520 is 2523021002.

It can be written as a sum of positive squares in 2 ways, for example, as 17434033444 + 2577999076 = 132038^2 + 50774^2 .

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, 250150367 + ... + 250150446.

Almost surely, 2^20012032520 is an apocalyptic number.

20012032520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012032520 is an abundant number, since it is smaller than the sum of its proper divisors (25015040740).

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

20012032520 is a wasteful number, since it uses less digits than its factorization.

20012032520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500300824 (or 500300820 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

Adding to 20012032520 its reverse (2523021002), we get a palindrome (22535053522).

The spelling of 20012032520 in words is "twenty billion, twelve million, thirty-two thousand, five hundred twenty".