18402696499 has 4 divisors (see below), whose sum is σ = 20075668920. Its totient is φ = 16729724080.

The previous prime is 18402696493. The next prime is 18402696551. The reversal of 18402696499 is 99469620481.

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 18402696499 - 2⁷ = 18402696371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18402696493) 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, 836486194 + ... + 836486215.

It is an arithmetic number, because the mean of its divisors is an integer number (5018917230).

Almost surely, 2^18402696499 is an apocalyptic number.

18402696499 is a deficient number, since it is larger than the sum of its proper divisors (1672972421).

18402696499 is a wasteful number, since it uses less digits than its factorization.

18402696499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672972420.

The product of its (nonzero) digits is 6718464, while the sum is 58.

The spelling of 18402696499 in words is "eighteen billion, four hundred two million, six hundred ninety-six thousand, four hundred ninety-nine".