18427357800 has 144 divisors (see below), whose sum is σ = 61924568940. Its totient is φ = 4910837760.

The previous prime is 18427357759. The next prime is 18427357801. The reversal of 18427357800 is 875372481.

18427357800 is a `hidden beast` number, since 1 + 8 + 4 + 2 + 73 + 578 + 0 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 14100612516 + 4326745284 = 118746^2 + 65778^2 .

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 (18427357801) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4780674 + ... + 4784526.

Almost surely, 2^18427357800 is an apocalyptic number.

18427357800 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 18427357800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30962284470).

18427357800 is an abundant number, since it is smaller than the sum of its proper divisors (43497211140).

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

18427357800 is a wasteful number, since it uses less digits than its factorization.

18427357800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6532 (or 6520 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 18427357800 in words is "eighteen billion, four hundred twenty-seven million, three hundred fifty-seven thousand, eight hundred".