19405302149 has 2 divisors, whose sum is σ = 19405302150. Its totient is φ = 19405302148.

The previous prime is 19405302139. The next prime is 19405302289. The reversal of 19405302149 is 94120350491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17083797025 + 2321505124 = 130705^2 + 48182^2 .

It is a cyclic number.

It is not a de Polignac number, because 19405302149 - 2²⁴ = 19388524933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19405302139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9702651074 + 9702651075.

It is an arithmetic number, because the mean of its divisors is an integer number (9702651075).

Almost surely, 2^19405302149 is an apocalyptic number.

It is an amenable number.

19405302149 is a deficient number, since it is larger than the sum of its proper divisors (1).

19405302149 is an equidigital number, since it uses as much as digits as its factorization.

19405302149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 19405302149 in words is "nineteen billion, four hundred five million, three hundred two thousand, one hundred forty-nine".