18285259440 has 480 divisors, whose sum is σ = 69901954560. Its totient is φ = 3934199808.

The previous prime is 18285259427. The next prime is 18285259451. The reversal of 18285259440 is 4495258281.

It is a super-2 number, since 2×18285259440² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 18285259440.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18121656 + ... + 18122664.

It is an arithmetic number, because the mean of its divisors is an integer number (145629072).

Almost surely, 2^18285259440 is an apocalyptic number.

18285259440 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 18285259440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34950977280).

18285259440 is an abundant number, since it is smaller than the sum of its proper divisors (51616695120).

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

18285259440 is a wasteful number, since it uses less digits than its factorization.

18285259440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129 (or 1116 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 48.

The spelling of 18285259440 in words is "eighteen billion, two hundred eighty-five million, two hundred fifty-nine thousand, four hundred forty".