18157453919 has 8 divisors (see below), whose sum is σ = 20132855760. Its totient is φ = 16236172800.

The previous prime is 18157453903. The next prime is 18157453927. The reversal of 18157453919 is 91935475181.

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

It is a cyclic number.

It is not a de Polignac number, because 18157453919 - 2⁴ = 18157453903 is a prime.

It is a super-2 number, since 2×18157453919² (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 (18157453939) 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, 13529474 + ... + 13530815.

It is an arithmetic number, because the mean of its divisors is an integer number (2516606970).

Almost surely, 2^18157453919 is an apocalyptic number.

18157453919 is a deficient number, since it is larger than the sum of its proper divisors (1975401841).

18157453919 is a wasteful number, since it uses less digits than its factorization.

18157453919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27060361.

The product of its digits is 1360800, while the sum is 53.

The spelling of 18157453919 in words is "eighteen billion, one hundred fifty-seven million, four hundred fifty-three thousand, nine hundred nineteen".