18536942340 has 240 divisors, whose sum is σ = 66592576512. Its totient is φ = 4228464384.

The previous prime is 18536942321. The next prime is 18536942351. The reversal of 18536942340 is 4324963581.

18536942340 is a `hidden beast` number, since 1 + 8 + 536 + 94 + 23 + 4 + 0 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 6882034 + ... + 6884726.

Almost surely, 2^18536942340 is an apocalyptic number.

18536942340 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 18536942340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33296288256).

18536942340 is an abundant number, since it is smaller than the sum of its proper divisors (48055634172).

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

18536942340 is a wasteful number, since it uses less digits than its factorization.

18536942340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328 (or 3317 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 18536942340 in words is "eighteen billion, five hundred thirty-six million, nine hundred forty-two thousand, three hundred forty".