18369998635 has 8 divisors (see below), whose sum is σ = 23340704256. Its totient is φ = 13831528320.

The previous prime is 18369998629. The next prime is 18369998657. The reversal of 18369998635 is 53689996381.

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 18369998635 - 2⁹ = 18369998123 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108058731 + ... + 108058900.

It is an arithmetic number, because the mean of its divisors is an integer number (2917588032).

Almost surely, 2^18369998635 is an apocalyptic number.

18369998635 is a deficient number, since it is larger than the sum of its proper divisors (4970705621).

18369998635 is a wasteful number, since it uses less digits than its factorization.

18369998635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216117653.

The product of its digits is 75582720, while the sum is 67.

The spelling of 18369998635 in words is "eighteen billion, three hundred sixty-nine million, nine hundred ninety-eight thousand, six hundred thirty-five".