20104443431 has 2 divisors, whose sum is σ = 20104443432. Its totient is φ = 20104443430.

The previous prime is 20104443409. The next prime is 20104443487. The reversal of 20104443431 is 13434440102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20104443431 - 2⁶ = 20104443367 is a prime.

It is a super-2 number, since 2×20104443431² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20104443431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20104443031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10052221715 + 10052221716.

It is an arithmetic number, because the mean of its divisors is an integer number (10052221716).

Almost surely, 2^20104443431 is an apocalyptic number.

20104443431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20104443431 is an equidigital number, since it uses as much as digits as its factorization.

20104443431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 20104443431 its reverse (13434440102), we get a palindrome (33538883533).

The spelling of 20104443431 in words is "twenty billion, one hundred four million, four hundred forty-three thousand, four hundred thirty-one".