18554387099712 has 28 divisors (see below), whose sum is σ = 49091815868496. Its totient is φ = 6184795699840.

The previous prime is 18554387099711. The next prime is 18554387099719. The reversal of 18554387099712 is 21799078345581.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18554387099711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48318716214 + ... + 48318716597.

Almost surely, 2^{18554387099712} is an apocalyptic number.

18554387099712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18554387099712 is an abundant number, since it is smaller than the sum of its proper divisors (30537428768784).

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

18554387099712 is an equidigital number, since it uses as much as digits as its factorization.

18554387099712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96637432826 (or 96637432816 counting only the distinct ones).

The product of its (nonzero) digits is 152409600, while the sum is 69.

The spelling of 18554387099712 in words is "eighteen trillion, five hundred fifty-four billion, three hundred eighty-seven million, ninety-nine thousand, seven hundred twelve".