20240343131 has 4 divisors (see below), whose sum is σ = 20369262672. Its totient is φ = 20111423592.

The previous prime is 20240343103. The next prime is 20240343169. The reversal of 20240343131 is 13134304202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13134304202 = 2 ⋅6567152101.

It is a cyclic number.

It is not a de Polignac number, because 20240343131 - 2³⁴ = 3060473947 is a prime.

It is a super-2 number, since 2×20240343131² (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 = 20240343097 and 20240343106.

It is not an unprimeable number, because it can be changed into a prime (20240343631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64459535 + ... + 64459848.

It is an arithmetic number, because the mean of its divisors is an integer number (5092315668).

Almost surely, 2^20240343131 is an apocalyptic number.

20240343131 is a deficient number, since it is larger than the sum of its proper divisors (128919541).

20240343131 is a wasteful number, since it uses less digits than its factorization.

20240343131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128919540.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 20240343131 its reverse (13134304202), we get a palindrome (33374647333).

The spelling of 20240343131 in words is "twenty billion, two hundred forty million, three hundred forty-three thousand, one hundred thirty-one".