18356540000 has 60 divisors (see below), whose sum is σ = 45159891084. Its totient is φ = 7342608000.

The previous prime is 18356539979. The next prime is 18356540047. The reversal of 18356540000 is 4565381.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 438914 + ... + 478913.

Almost surely, 2^18356540000 is an apocalyptic number.

18356540000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18356540000 is an abundant number, since it is smaller than the sum of its proper divisors (26803351084).

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

18356540000 is an frugal number, since it uses more digits than its factorization.

18356540000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917857 (or 917834 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 18356540000 in words is "eighteen billion, three hundred fifty-six million, five hundred forty thousand".