19924169431 has 2 divisors, whose sum is σ = 19924169432. Its totient is φ = 19924169430.

The previous prime is 19924169413. The next prime is 19924169467. The reversal of 19924169431 is 13496142991.

Together with previous prime (19924169413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19924169431 - 2⁹ = 19924168919 is a prime.

It is a super-2 number, since 2×19924169431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19924169401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9962084715 + 9962084716.

It is an arithmetic number, because the mean of its divisors is an integer number (9962084716).

Almost surely, 2^19924169431 is an apocalyptic number.

19924169431 is a deficient number, since it is larger than the sum of its proper divisors (1).

19924169431 is an equidigital number, since it uses as much as digits as its factorization.

19924169431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 49.

The spelling of 19924169431 in words is "nineteen billion, nine hundred twenty-four million, one hundred sixty-nine thousand, four hundred thirty-one".