18039772000 has 192 divisors, whose sum is σ = 45254873664. Its totient is φ = 7066214400.

The previous prime is 18039771991. The next prime is 18039772001. The reversal of 18039772000 is 27793081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18039772001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48363814 + ... + 48364186.

It is an arithmetic number, because the mean of its divisors is an integer number (235702467).

Almost surely, 2^18039772000 is an apocalyptic number.

18039772000 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 18039772000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22627436832).

18039772000 is an abundant number, since it is smaller than the sum of its proper divisors (27215101664).

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

18039772000 is a wasteful number, since it uses less digits than its factorization.

18039772000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618 (or 600 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The spelling of 18039772000 in words is "eighteen billion, thirty-nine million, seven hundred seventy-two thousand".