18018005747700 has 144 divisors (see below), whose sum is σ = 59583022692480. Its totient is φ = 4118160506880.

The previous prime is 18018005747689. The next prime is 18018005747761. The reversal of 18018005747700 is 774750081081.

It is a super-2 number, since 2×18018005747700² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18018005747700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36988924 + ... + 37472876.

It is an arithmetic number, because the mean of its divisors is an integer number (413770990920).

Almost surely, 2^{18018005747700} is an apocalyptic number.

18018005747700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18018005747700 is an abundant number, since it is smaller than the sum of its proper divisors (41565016944780).

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

18018005747700 is a wasteful number, since it uses less digits than its factorization.

18018005747700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501706 (or 501699 counting only the distinct ones).

The product of its (nonzero) digits is 439040, while the sum is 48.

The spelling of 18018005747700 in words is "eighteen trillion, eighteen billion, five million, seven hundred forty-seven thousand, seven hundred".