18146872919 has 4 divisors (see below), whose sum is σ = 20739283344. Its totient is φ = 15554462496.

The previous prime is 18146872801. The next prime is 18146872927. The reversal of 18146872919 is 91927864181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91927864181 = 271 ⋅339217211.

It is a cyclic number.

It is not a de Polignac number, because 18146872919 - 2⁸ = 18146872663 is a prime.

It is a super-2 number, since 2×18146872919² (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 (18146872949) 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, 1296205202 + ... + 1296205215.

It is an arithmetic number, because the mean of its divisors is an integer number (5184820836).

Almost surely, 2^18146872919 is an apocalyptic number.

18146872919 is a deficient number, since it is larger than the sum of its proper divisors (2592410425).

18146872919 is an equidigital number, since it uses as much as digits as its factorization.

18146872919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2592410424.

The product of its digits is 1741824, while the sum is 56.

The spelling of 18146872919 in words is "eighteen billion, one hundred forty-six million, eight hundred seventy-two thousand, nine hundred nineteen".