20001000131 has 4 divisors (see below), whose sum is σ = 22858285872. Its totient is φ = 17143714392.

The previous prime is 20001000109. The next prime is 20001000181. The reversal of 20001000131 is 13100010002.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20001000131 - 2²² = 19996805827 is a prime.

It is a super-2 number, since 2×20001000131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001000181) 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, 1428642860 + ... + 1428642873.

It is an arithmetic number, because the mean of its divisors is an integer number (5714571468).

Almost surely, 2^20001000131 is an apocalyptic number.

20001000131 is a deficient number, since it is larger than the sum of its proper divisors (2857285741).

20001000131 is an equidigital number, since it uses as much as digits as its factorization.

20001000131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857285740.

The product of its (nonzero) digits is 6, while the sum is 8.

Adding to 20001000131 its reverse (13100010002), we get a palindrome (33101010133).

The spelling of 20001000131 in words is "twenty billion, one million, one hundred thirty-one", and thus it is an aban number.