18139120272 has 360 divisors, whose sum is σ = 65656631040. Its totient is φ = 4628897280.

The previous prime is 18139120271. The next prime is 18139120283. The reversal of 18139120272 is 27202193181.

18139120272 is a `hidden beast` number, since 181 + 391 + 20 + 2 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18139120271) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2840379 + ... + 2846757.

Almost surely, 2^18139120272 is an apocalyptic number.

18139120272 is a gapful number since it is divisible by the number (12) 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 18139120272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32828315520).

18139120272 is an abundant number, since it is smaller than the sum of its proper divisors (47517510768).

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

18139120272 is a wasteful number, since it uses less digits than its factorization.

18139120272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6451 (or 6435 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 18139120272 in words is "eighteen billion, one hundred thirty-nine million, one hundred twenty thousand, two hundred seventy-two".