18273935380 has 24 divisors (see below), whose sum is σ = 38424058848. Its totient is φ = 7300279968.

The previous prime is 18273935377. The next prime is 18273935411. The reversal of 18273935380 is 8353937281.

It is a congruent number.

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, 564754 + ... + 596233.

It is an arithmetic number, because the mean of its divisors is an integer number (1601002452).

Almost surely, 2^18273935380 is an apocalyptic number.

18273935380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18273935380 is an abundant number, since it is smaller than the sum of its proper divisors (20150123468).

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

18273935380 is a wasteful number, since it uses less digits than its factorization.

18273935380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161783 (or 1161781 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 18273935380 in words is "eighteen billion, two hundred seventy-three million, nine hundred thirty-five thousand, three hundred eighty".