19137070409 has 2 divisors, whose sum is σ = 19137070410. Its totient is φ = 19137070408.

The previous prime is 19137070399. The next prime is 19137070483. The reversal of 19137070409 is 90407073191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13934622025 + 5202448384 = 118045^2 + 72128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19137070409 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (19137070109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9568535204 + 9568535205.

It is an arithmetic number, because the mean of its divisors is an integer number (9568535205).

Almost surely, 2^19137070409 is an apocalyptic number.

It is an amenable number.

19137070409 is a deficient number, since it is larger than the sum of its proper divisors (1).

19137070409 is an equidigital number, since it uses as much as digits as its factorization.

19137070409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 41.

The spelling of 19137070409 in words is "nineteen billion, one hundred thirty-seven million, seventy thousand, four hundred nine".