18218335476 has 72 divisors (see below), whose sum is σ = 46837820512. Its totient is φ = 5507409600.

The previous prime is 18218335469. The next prime is 18218335477. The reversal of 18218335476 is 67453381281.

Its product of digits (967680) is a multiple of the sum of its prime divisors (30240).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18218335477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 596391 + ... + 626193.

Almost surely, 2^18218335476 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18218335476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23418910256).

18218335476 is an abundant number, since it is smaller than the sum of its proper divisors (28619485036).

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

18218335476 is a wasteful number, since it uses less digits than its factorization.

18218335476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30253 (or 30240 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The spelling of 18218335476 in words is "eighteen billion, two hundred eighteen million, three hundred thirty-five thousand, four hundred seventy-six".