20204423431 has 8 divisors (see below), whose sum is σ = 20267760240. Its totient is φ = 20141121792.

The previous prime is 20204423423. The next prime is 20204423441. The reversal of 20204423431 is 13432440202.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20204423431 - 2³ = 20204423423 is a prime.

It is a super-2 number, since 2×20204423431² (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 = 20204423396 and 20204423405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20204423401) 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, 1579660 + ... + 1592398.

It is an arithmetic number, because the mean of its divisors is an integer number (2533470030).

Almost surely, 2^20204423431 is an apocalyptic number.

20204423431 is a deficient number, since it is larger than the sum of its proper divisors (63336809).

20204423431 is a wasteful number, since it uses less digits than its factorization.

20204423431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17585.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20204423431 its reverse (13432440202), we get a palindrome (33636863633).

The spelling of 20204423431 in words is "twenty billion, two hundred four million, four hundred twenty-three thousand, four hundred thirty-one".