18269033720 has 128 divisors (see below), whose sum is σ = 49184755200. Its totient is φ = 5974596096.

The previous prime is 18269033659. The next prime is 18269033747. The reversal of 18269033720 is 2733096281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 660407 + ... + 687513.

It is an arithmetic number, because the mean of its divisors is an integer number (384255900).

Almost surely, 2^18269033720 is an apocalyptic number.

18269033720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18269033720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24592377600).

18269033720 is an abundant number, since it is smaller than the sum of its proper divisors (30915721480).

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

18269033720 is a wasteful number, since it uses less digits than its factorization.

18269033720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27237 (or 27233 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 18269033720 in words is "eighteen billion, two hundred sixty-nine million, thirty-three thousand, seven hundred twenty".