20204031431 has 4 divisors (see below), whose sum is σ = 20900722200. Its totient is φ = 19507340664.

The previous prime is 20204031403. The next prime is 20204031437. The reversal of 20204031431 is 13413040202.

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

It is a cyclic number.

It is not a de Polignac number, because 20204031431 - 2³⁴ = 3024162247 is a prime.

It is a super-2 number, since 2×20204031431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20204031437) 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, 348345341 + ... + 348345398.

It is an arithmetic number, because the mean of its divisors is an integer number (5225180550).

Almost surely, 2^20204031431 is an apocalyptic number.

20204031431 is a deficient number, since it is larger than the sum of its proper divisors (696690769).

20204031431 is an equidigital number, since it uses as much as digits as its factorization.

20204031431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696690768.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20204031431 its reverse (13413040202), we get a palindrome (33617071633).

The spelling of 20204031431 in words is "twenty billion, two hundred four million, thirty-one thousand, four hundred thirty-one".