20050423131 has 4 divisors (see below), whose sum is σ = 26733897512. Its totient is φ = 13366948752.

The previous prime is 20050423103. The next prime is 20050423147. The reversal of 20050423131 is 13132405002.

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

It is not a de Polignac number, because 20050423131 - 2¹⁰ = 20050422107 is a prime.

It is a super-2 number, since 2×20050423131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20050423098 and 20050423107.

It is not an unprimeable number, because it can be changed into a prime (20050423181) 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, 3341737186 + ... + 3341737191.

It is an arithmetic number, because the mean of its divisors is an integer number (6683474378).

Almost surely, 2^20050423131 is an apocalyptic number.

20050423131 is a deficient number, since it is larger than the sum of its proper divisors (6683474381).

20050423131 is an equidigital number, since it uses as much as digits as its factorization.

20050423131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6683474380.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 20050423131 its reverse (13132405002), we get a palindrome (33182828133).

The spelling of 20050423131 in words is "twenty billion, fifty million, four hundred twenty-three thousand, one hundred thirty-one".