18934185240 has 128 divisors (see below), whose sum is σ = 63568512000. Its totient is φ = 5012751744.

The previous prime is 18934185211. The next prime is 18934185307. The reversal of 18934185240 is 4258143981.

18934185240 is a `hidden beast` number, since 1 + 89 + 3 + 41 + 8 + 524 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87057 + ... + 213183.

It is an arithmetic number, because the mean of its divisors is an integer number (496629000).

Almost surely, 2^18934185240 is an apocalyptic number.

18934185240 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 18934185240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31784256000).

18934185240 is an abundant number, since it is smaller than the sum of its proper divisors (44634326760).

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

18934185240 is a wasteful number, since it uses less digits than its factorization.

18934185240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126286 (or 126276 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 18934185240 in words is "eighteen billion, nine hundred thirty-four million, one hundred eighty-five thousand, two hundred forty".