18039120280 has 64 divisors (see below), whose sum is σ = 41428311840. Its totient is φ = 7066755072.

The previous prime is 18039120247. The next prime is 18039120287. The reversal of 18039120280 is 8202193081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18039120287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1215867 + ... + 1230613.

Almost surely, 2^18039120280 is an apocalyptic number.

18039120280 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 18039120280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20714155920).

18039120280 is an abundant number, since it is smaller than the sum of its proper divisors (23389191560).

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

18039120280 is a wasteful number, since it uses less digits than its factorization.

18039120280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15388 (or 15384 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 18039120280 in words is "eighteen billion, thirty-nine million, one hundred twenty thousand, two hundred eighty".