19421336959 has 2 divisors, whose sum is σ = 19421336960. Its totient is φ = 19421336958.

The previous prime is 19421336933. The next prime is 19421336981. The reversal of 19421336959 is 95963312491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19421336959 - 2²⁵ = 19387782527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19421336929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9710668479 + 9710668480.

It is an arithmetic number, because the mean of its divisors is an integer number (9710668480).

Almost surely, 2^19421336959 is an apocalyptic number.

19421336959 is a deficient number, since it is larger than the sum of its proper divisors (1).

19421336959 is an equidigital number, since it uses as much as digits as its factorization.

19421336959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 52.

The spelling of 19421336959 in words is "nineteen billion, four hundred twenty-one million, three hundred thirty-six thousand, nine hundred fifty-nine".