20431532020 has 12 divisors (see below), whose sum is σ = 42906217284. Its totient is φ = 8172612800.

The previous prime is 20431532003. The next prime is 20431532039. The reversal of 20431532020 is 2023513402.

It can be written as a sum of positive squares in 2 ways, for example, as 2084287716 + 18347244304 = 45654^2 + 135452^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20431531982 and 20431532000.

It is a congruent number.

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, 510788281 + ... + 510788320.

It is an arithmetic number, because the mean of its divisors is an integer number (3575518107).

Almost surely, 2^20431532020 is an apocalyptic number.

20431532020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20431532020 is an abundant number, since it is smaller than the sum of its proper divisors (22474685264).

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

20431532020 is a wasteful number, since it uses less digits than its factorization.

20431532020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021576610 (or 1021576608 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The spelling of 20431532020 in words is "twenty billion, four hundred thirty-one million, five hundred thirty-two thousand, twenty".