18000705330 has 80 divisors (see below), whose sum is σ = 49195505304. Its totient is φ = 4721483520.

The previous prime is 18000705329. The next prime is 18000705343. The reversal of 18000705330 is 3350700081.

It can be written as a sum of positive squares in 4 ways, for example, as 8638401249 + 9362304081 = 92943^2 + 96759^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 18000705294 and 18000705303.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 132747 + ... + 231566.

Almost surely, 2^18000705330 is an apocalyptic number.

18000705330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18000705330 is an abundant number, since it is smaller than the sum of its proper divisors (31194799974).

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

18000705330 is a wasteful number, since it uses less digits than its factorization.

18000705330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364393 (or 364384 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The spelling of 18000705330 in words is "eighteen billion, seven hundred five thousand, three hundred thirty".