18135094997 has 4 divisors (see below), whose sum is σ = 18150852096. Its totient is φ = 18119337900.

The previous prime is 18135094973. The next prime is 18135095059. The reversal of 18135094997 is 79949053181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18135094997 - 2⁸ = 18135094741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18135094927) 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, 7876823 + ... + 7879124.

It is an arithmetic number, because the mean of its divisors is an integer number (4537713024).

Almost surely, 2^18135094997 is an apocalyptic number.

It is an amenable number.

18135094997 is a deficient number, since it is larger than the sum of its proper divisors (15757099).

18135094997 is a wasteful number, since it uses less digits than its factorization.

18135094997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15757098.

The product of its (nonzero) digits is 2449440, while the sum is 56.

The spelling of 18135094997 in words is "eighteen billion, one hundred thirty-five million, ninety-four thousand, nine hundred ninety-seven".