18337773420 has 72 divisors (see below), whose sum is σ = 56144494224. Its totient is φ = 4844366208.

The previous prime is 18337773397. The next prime is 18337773451. The reversal of 18337773420 is 2437773381.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 456799 + ... + 495318.

It is an arithmetic number, because the mean of its divisors is an integer number (779784642).

Almost surely, 2^18337773420 is an apocalyptic number.

18337773420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18337773420 is an abundant number, since it is smaller than the sum of its proper divisors (37806720804).

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

18337773420 is a wasteful number, since it uses less digits than its factorization.

18337773420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952239 (or 952234 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 45.

The spelling of 18337773420 in words is "eighteen billion, three hundred thirty-seven million, seven hundred seventy-three thousand, four hundred twenty".