18735222240 has 1152 divisors, whose sum is σ = 82106099712. Its totient is φ = 3941498880.

The previous prime is 18735222229. The next prime is 18735222271. The reversal of 18735222240 is 4222253781.

18735222240 is a `hidden beast` number, since 1 + 8 + 73 + 522 + 22 + 40 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 18735222195 and 18735222204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 256646844 + ... + 256646916.

It is an arithmetic number, because the mean of its divisors is an integer number (71272656).

Almost surely, 2^18735222240 is an apocalyptic number.

18735222240 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 18735222240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41053049856).

18735222240 is an abundant number, since it is smaller than the sum of its proper divisors (63370877472).

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

18735222240 is a wasteful number, since it uses less digits than its factorization.

18735222240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The spelling of 18735222240 in words is "eighteen billion, seven hundred thirty-five million, two hundred twenty-two thousand, two hundred forty".