18440804250 has 160 divisors (see below), whose sum is σ = 56257426368. Its totient is φ = 4470444000.

The previous prime is 18440804219. The next prime is 18440804257. The reversal of 18440804250 is 5240804481.

It is a super-2 number, since 2×18440804250² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18440804257) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 181357 + ... + 264143.

Almost surely, 2^18440804250 is an apocalyptic number.

18440804250 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 18440804250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28128713184).

18440804250 is an abundant number, since it is smaller than the sum of its proper divisors (37816622118).

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

18440804250 is a wasteful number, since it uses less digits than its factorization.

18440804250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82827 (or 82808 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 36.

The spelling of 18440804250 in words is "eighteen billion, four hundred forty million, eight hundred four thousand, two hundred fifty".