20020312131 has 8 divisors (see below), whose sum is σ = 26903937024. Its totient is φ = 13241781000.

The previous prime is 20020312121. The next prime is 20020312133. The reversal of 20020312131 is 13121302002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20020312131 - 2⁵ = 20020312099 is a prime.

It is a super-2 number, since 2×20020312131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20020312131.

It is not an unprimeable number, because it can be changed into a prime (20020312133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26272995 + ... + 26273756.

It is an arithmetic number, because the mean of its divisors is an integer number (3362992128).

Almost surely, 2^20020312131 is an apocalyptic number.

20020312131 is a deficient number, since it is larger than the sum of its proper divisors (6883624893).

20020312131 is a wasteful number, since it uses less digits than its factorization.

20020312131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52546881.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20020312131 its reverse (13121302002), we get a palindrome (33141614133).

The spelling of 20020312131 in words is "twenty billion, twenty million, three hundred twelve thousand, one hundred thirty-one".