18002272919 has 4 divisors (see below), whose sum is σ = 18087591960. Its totient is φ = 17916953880.

The previous prime is 18002272879. The next prime is 18002272933. The reversal of 18002272919 is 91927220081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91927220081 = 1229 ⋅74798389.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18002272919 is a prime.

It is a super-2 number, since 2×18002272919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18002272949) 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, 42659204 + ... + 42659625.

It is an arithmetic number, because the mean of its divisors is an integer number (4521897990).

Almost surely, 2^18002272919 is an apocalyptic number.

18002272919 is a deficient number, since it is larger than the sum of its proper divisors (85319041).

18002272919 is an equidigital number, since it uses as much as digits as its factorization.

18002272919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85319040.

The product of its (nonzero) digits is 36288, while the sum is 41.

The spelling of 18002272919 in words is "eighteen billion, two million, two hundred seventy-two thousand, nine hundred nineteen".