18212343044 has 24 divisors (see below), whose sum is σ = 36758863680. Its totient is φ = 7733680416.

The previous prime is 18212343029. The next prime is 18212343053. The reversal of 18212343044 is 44034321281.

It is a self number, because there is not a number n which added to its sum of digits gives 18212343044.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2980622 + ... + 2986725.

It is an arithmetic number, because the mean of its divisors is an integer number (1531619320).

Almost surely, 2^18212343044 is an apocalyptic number.

18212343044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18212343044 is an abundant number, since it is smaller than the sum of its proper divisors (18546520636).

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

18212343044 is a wasteful number, since it uses less digits than its factorization.

18212343044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5967467 (or 5967465 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 18212343044 in words is "eighteen billion, two hundred twelve million, three hundred forty-three thousand, forty-four".