18044383770 has 480 divisors, whose sum is σ = 59575182480. Its totient is φ = 3901685760.

The previous prime is 18044383757. The next prime is 18044383793. The reversal of 18044383770 is 7738344081.

18044383770 is a `hidden beast` number, since 180 + 4 + 438 + 37 + 7 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 8471913849 + 9572469921 = 92043^2 + 97839^2 .

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 239 ways as a sum of consecutive naturals, for example, 70211482 + ... + 70211738.

Almost surely, 2^18044383770 is an apocalyptic number.

18044383770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18044383770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29787591240).

18044383770 is an abundant number, since it is smaller than the sum of its proper divisors (41530798710).

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

18044383770 is a wasteful number, since it uses less digits than its factorization.

18044383770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 18044383770 in words is "eighteen billion, forty-four million, three hundred eighty-three thousand, seven hundred seventy".