20040320131 has 8 divisors (see below), whose sum is σ = 21586297824. Its totient is φ = 18494973120.

The previous prime is 20040320117. The next prime is 20040320147. The reversal of 20040320131 is 13102304002.

It is a happy number.

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

It is not a de Polignac number, because 20040320131 - 2²⁵ = 20006765699 is a prime.

It is a super-2 number, since 2×20040320131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20040320161) 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, 90610 + ... + 219751.

It is an arithmetic number, because the mean of its divisors is an integer number (2698287228).

Almost surely, 2^20040320131 is an apocalyptic number.

20040320131 is a deficient number, since it is larger than the sum of its proper divisors (1545977693).

20040320131 is a wasteful number, since it uses less digits than its factorization.

20040320131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315341.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20040320131 its reverse (13102304002), we get a palindrome (33142624133).

The spelling of 20040320131 in words is "twenty billion, forty million, three hundred twenty thousand, one hundred thirty-one".