18220735814 has 4 divisors (see below), whose sum is σ = 27331103724. Its totient is φ = 9110367906.

The previous prime is 18220735781. The next prime is 18220735837. The reversal of 18220735814 is 41853702281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41853702281 = 18457 ⋅2267633.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4555183952 + ... + 4555183955.

It is an arithmetic number, because the mean of its divisors is an integer number (6832775931).

Almost surely, 2^18220735814 is an apocalyptic number.

18220735814 is a deficient number, since it is larger than the sum of its proper divisors (9110367910).

18220735814 is an equidigital number, since it uses as much as digits as its factorization.

18220735814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9110367909.

The product of its (nonzero) digits is 107520, while the sum is 41.

The spelling of 18220735814 in words is "eighteen billion, two hundred twenty million, seven hundred thirty-five thousand, eight hundred fourteen".