19157072291 has 12 divisors (see below), whose sum is σ = 22320110160. Its totient is φ = 16394298480.

The previous prime is 19157072273. The next prime is 19157072293. The reversal of 19157072291 is 19227075191.

It is not a de Polignac number, because 19157072291 - 2⁶ = 19157072227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19157072293) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 278876 + ... + 340713.

It is an arithmetic number, because the mean of its divisors is an integer number (1860009180).

Almost surely, 2^19157072291 is an apocalyptic number.

19157072291 is a deficient number, since it is larger than the sum of its proper divisors (3163037869).

19157072291 is an equidigital number, since it uses as much as digits as its factorization.

19157072291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620234 (or 620227 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 44.

The spelling of 19157072291 in words is "nineteen billion, one hundred fifty-seven million, seventy-two thousand, two hundred ninety-one".