19308869493 has 4 divisors (see below), whose sum is σ = 25745159328. Its totient is φ = 12872579660.

The previous prime is 19308869483. The next prime is 19308869507. The reversal of 19308869493 is 39496880391.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19308869493 - 2²⁴ = 19292092277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19308869413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3218144913 + ... + 3218144918.

It is an arithmetic number, because the mean of its divisors is an integer number (6436289832).

Almost surely, 2^19308869493 is an apocalyptic number.

It is an amenable number.

19308869493 is a deficient number, since it is larger than the sum of its proper divisors (6436289835).

19308869493 is an equidigital number, since it uses as much as digits as its factorization.

19308869493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6436289834.

The product of its (nonzero) digits is 10077696, while the sum is 60.

The spelling of 19308869493 in words is "nineteen billion, three hundred eight million, eight hundred sixty-nine thousand, four hundred ninety-three".