19436382913 has 2 divisors, whose sum is σ = 19436382914. Its totient is φ = 19436382912.

The previous prime is 19436382887. The next prime is 19436382943. The reversal of 19436382913 is 31928363491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19271825329 + 164557584 = 138823^2 + 12828^2 .

It is a cyclic number.

It is not a de Polignac number, because 19436382913 - 2⁵ = 19436382881 is a prime.

It is not a weakly prime, because it can be changed into another prime (19436382943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9718191456 + 9718191457.

It is an arithmetic number, because the mean of its divisors is an integer number (9718191457).

Almost surely, 2^19436382913 is an apocalyptic number.

It is an amenable number.

19436382913 is a deficient number, since it is larger than the sum of its proper divisors (1).

19436382913 is an equidigital number, since it uses as much as digits as its factorization.

19436382913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 49.

The spelling of 19436382913 in words is "nineteen billion, four hundred thirty-six million, three hundred eighty-two thousand, nine hundred thirteen".