18745633799 has 4 divisors (see below), whose sum is σ = 18815320440. Its totient is φ = 18675947160.

The previous prime is 18745633783. The next prime is 18745633801. The reversal of 18745633799 is 99733654781.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18745633799 - 2⁴ = 18745633783 is a prime.

It is a super-2 number, since 2×18745633799² (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 (18745633399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34842917 + ... + 34843454.

It is an arithmetic number, because the mean of its divisors is an integer number (4703830110).

Almost surely, 2^18745633799 is an apocalyptic number.

18745633799 is a deficient number, since it is larger than the sum of its proper divisors (69686641).

18745633799 is an equidigital number, since it uses as much as digits as its factorization.

18745633799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69686640.

The product of its digits is 34292160, while the sum is 62.

The spelling of 18745633799 in words is "eighteen billion, seven hundred forty-five million, six hundred thirty-three thousand, seven hundred ninety-nine".