19239102945 has 24 divisors (see below), whose sum is σ = 33355236096. Its totient is φ = 10258560288.

The previous prime is 19239102941. The next prime is 19239102959. The reversal of 19239102945 is 54920193291.

It is not a de Polignac number, because 19239102945 - 2² = 19239102941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 19239102945.

It is not an unprimeable number, because it can be changed into a prime (19239102941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166182 + ... + 257088.

It is an arithmetic number, because the mean of its divisors is an integer number (1389801504).

Almost surely, 2^19239102945 is an apocalyptic number.

19239102945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19239102945 is a deficient number, since it is larger than the sum of its proper divisors (14116133151).

19239102945 is a wasteful number, since it uses less digits than its factorization.

19239102945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95621 (or 95618 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The spelling of 19239102945 in words is "nineteen billion, two hundred thirty-nine million, one hundred two thousand, nine hundred forty-five".