18505218702 has 16 divisors (see below), whose sum is σ = 38010719952. Its totient is φ = 6001692480.

The previous prime is 18505218691. The next prime is 18505218703. The reversal of 18505218702 is 20781250581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18505218703) 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, 41678199 + ... + 41678642.

It is an arithmetic number, because the mean of its divisors is an integer number (2375669997).

Almost surely, 2^18505218702 is an apocalyptic number.

18505218702 is an abundant number, since it is smaller than the sum of its proper divisors (19505501250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18505218702 is a wasteful number, since it uses less digits than its factorization.

18505218702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83356883.

The product of its (nonzero) digits is 44800, while the sum is 39.

The spelling of 18505218702 in words is "eighteen billion, five hundred five million, two hundred eighteen thousand, seven hundred two".