18099774000 has 800 divisors, whose sum is σ = 81566065152. Its totient is φ = 3758400000.

The previous prime is 18099773999. The next prime is 18099774001. The reversal of 18099774000 is 47799081.

It is an interprime number because it is at equal distance from previous prime (18099773999) and next prime (18099774001).

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

It is not an unprimeable number, because it can be changed into a prime (18099774001) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 12473275 + ... + 12474725.

Almost surely, 2^18099774000 is an apocalyptic number.

18099774000 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 18099774000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40783032576).

18099774000 is an abundant number, since it is smaller than the sum of its proper divisors (63466291152).

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

18099774000 is a wasteful number, since it uses less digits than its factorization.

18099774000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504 (or 1479 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The spelling of 18099774000 in words is "eighteen billion, ninety-nine million, seven hundred seventy-four thousand".