18145958919 has 8 divisors (see below), whose sum is σ = 26394122112. Its totient is φ = 10997550840.

The previous prime is 18145958917. The next prime is 18145958923. The reversal of 18145958919 is 91985954181.

It is a happy number.

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

It is not a de Polignac number, because 18145958919 - 2¹ = 18145958917 is a prime.

It is a super-2 number, since 2×18145958919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18145958917) 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, 274938739 + ... + 274938804.

It is an arithmetic number, because the mean of its divisors is an integer number (3299265264).

Almost surely, 2^18145958919 is an apocalyptic number.

18145958919 is a deficient number, since it is larger than the sum of its proper divisors (8248163193).

18145958919 is a wasteful number, since it uses less digits than its factorization.

18145958919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549877557.

The product of its digits is 4665600, while the sum is 60.

The spelling of 18145958919 in words is "eighteen billion, one hundred forty-five million, nine hundred fifty-eight thousand, nine hundred nineteen".