19893109297 has 8 divisors (see below), whose sum is σ = 20101349576. Its totient is φ = 19684933632.

The previous prime is 19893109273. The next prime is 19893109333. The reversal of 19893109297 is 79290139891.

It can be written as a sum of positive squares in 4 ways, for example, as 7214124096 + 12678985201 = 84936^2 + 112601^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19893109297 - 2¹¹ = 19893107249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19893103297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 835753 + ... + 859225.

It is an arithmetic number, because the mean of its divisors is an integer number (2512668697).

Almost surely, 2^19893109297 is an apocalyptic number.

It is an amenable number.

19893109297 is a deficient number, since it is larger than the sum of its proper divisors (208240279).

19893109297 is an equidigital number, since it uses as much as digits as its factorization.

19893109297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32307.

The product of its (nonzero) digits is 2204496, while the sum is 58.

The spelling of 19893109297 in words is "nineteen billion, eight hundred ninety-three million, one hundred nine thousand, two hundred ninety-seven".