18217342 has 16 divisors (see below), whose sum is σ = 32103792. Its totient is φ = 7643520.

The previous prime is 18217327. The next prime is 18217349. The reversal of 18217342 is 24371281.

It is a self number, because there is not a number n which added to its sum of digits gives 18217342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18217349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31563 + ... + 32134.

It is an arithmetic number, because the mean of its divisors is an integer number (2006487).

Almost surely, 2^18217342 is an apocalyptic number.

18217342 is a deficient number, since it is larger than the sum of its proper divisors (13886450).

18217342 is a wasteful number, since it uses less digits than its factorization.

18217342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63723.

The product of its digits is 2688, while the sum is 28.

The square root of 18217342 is about 4268.1778313468. The cubic root of 18217342 is about 263.1247318056.

The spelling of 18217342 in words is "eighteen million, two hundred seventeen thousand, three hundred forty-two".