18149927040 has 512 divisors, whose sum is σ = 73958976000. Its totient is φ = 4120657920.

The previous prime is 18149927017. The next prime is 18149927057. The reversal of 18149927040 is 4072994181.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21893346 + ... + 21894174.

It is an arithmetic number, because the mean of its divisors is an integer number (144451125).

Almost surely, 2^18149927040 is an apocalyptic number.

18149927040 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 18149927040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36979488000).

18149927040 is an abundant number, since it is smaller than the sum of its proper divisors (55809048960).

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

18149927040 is a wasteful number, since it uses less digits than its factorization.

18149927040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045 (or 1027 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 18149927040 in words is "eighteen billion, one hundred forty-nine million, nine hundred twenty-seven thousand, forty".