19290814491 has 16 divisors (see below), whose sum is σ = 27708421664. Its totient is φ = 11867503104.

The previous prime is 19290814489. The next prime is 19290814493. The reversal of 19290814491 is 19441809291.

It is an interprime number because it is at equal distance from previous prime (19290814489) and next prime (19290814493).

It is not a de Polignac number, because 19290814491 - 2¹ = 19290814489 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19290814491.

It is not an unprimeable number, because it can be changed into a prime (19290814493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48585 + ... + 202341.

It is an arithmetic number, because the mean of its divisors is an integer number (1731776354).

Almost surely, 2^19290814491 is an apocalyptic number.

19290814491 is a deficient number, since it is larger than the sum of its proper divisors (8417607173).

19290814491 is a wasteful number, since it uses less digits than its factorization.

19290814491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156990.

The product of its (nonzero) digits is 186624, while the sum is 48.

The spelling of 19290814491 in words is "nineteen billion, two hundred ninety million, eight hundred fourteen thousand, four hundred ninety-one".