18010475280 has 240 divisors, whose sum is σ = 72164845440. Its totient is φ = 4116655872.

The previous prime is 18010475261. The next prime is 18010475303. The reversal of 18010475280 is 8257401081.

18010475280 is a `hidden beast` number, since 1 + 80 + 10 + 47 + 528 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×18010475280² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20757 + ... + 190923.

It is an arithmetic number, because the mean of its divisors is an integer number (300686856).

Almost surely, 2^18010475280 is an apocalyptic number.

18010475280 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 18010475280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36082422720).

18010475280 is an abundant number, since it is smaller than the sum of its proper divisors (54154370160).

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

18010475280 is a wasteful number, since it uses less digits than its factorization.

18010475280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170203 (or 170184 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The spelling of 18010475280 in words is "eighteen billion, ten million, four hundred seventy-five thousand, two hundred eighty".