18218210930 has 16 divisors (see below), whose sum is σ = 33923565720. Its totient is φ = 7035998592.

The previous prime is 18218210929. The next prime is 18218210953. The reversal of 18218210930 is 3901281281.

It can be written as a sum of positive squares in 4 ways, for example, as 17796360409 + 421850521 = 133403^2 + 20539^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31410419 + ... + 31410998.

Almost surely, 2^18218210930 is an apocalyptic number.

18218210930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18218210930 is a deficient number, since it is larger than the sum of its proper divisors (15705354790).

18218210930 is a wasteful number, since it uses less digits than its factorization.

18218210930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62821453.

The product of its (nonzero) digits is 6912, while the sum is 35.

The spelling of 18218210930 in words is "eighteen billion, two hundred eighteen million, two hundred ten thousand, nine hundred thirty".