20051250131 has 8 divisors (see below), whose sum is σ = 22054870128. Its totient is φ = 18228408000.

The previous prime is 20051250119. The next prime is 20051250137. The reversal of 20051250131 is 13105215002.

It is a happy number.

It is not a de Polignac number, because 20051250131 - 2²² = 20047055827 is a prime.

It is a super-2 number, since 2×20051250131² (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 (20051250137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7531070 + ... + 7533731.

It is an arithmetic number, because the mean of its divisors is an integer number (2756858766).

Almost surely, 2^20051250131 is an apocalyptic number.

20051250131 is a deficient number, since it is larger than the sum of its proper divisors (2003619997).

20051250131 is an equidigital number, since it uses as much as digits as its factorization.

20051250131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15064834 (or 15064812 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

Adding to 20051250131 its reverse (13105215002), we get a palindrome (33156465133).

The spelling of 20051250131 in words is "twenty billion, fifty-one million, two hundred fifty thousand, one hundred thirty-one".