20013131020 has 12 divisors (see below), whose sum is σ = 42027575184. Its totient is φ = 8005252400.

The previous prime is 20013131011. The next prime is 20013131023. The reversal of 20013131020 is 2013131002.

It is not an unprimeable number, because it can be changed into a prime (20013131023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500328256 + ... + 500328295.

It is an arithmetic number, because the mean of its divisors is an integer number (3502297932).

Almost surely, 2^20013131020 is an apocalyptic number.

20013131020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20013131020 is an abundant number, since it is smaller than the sum of its proper divisors (22014444164).

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

20013131020 is a wasteful number, since it uses less digits than its factorization.

20013131020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000656560 (or 1000656558 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20013131020 its reverse (2013131002), we get a palindrome (22026262022).

The spelling of 20013131020 in words is "twenty billion, thirteen million, one hundred thirty-one thousand, twenty".