16218642 has 32 divisors (see below), whose sum is σ = 36532224. Its totient is φ = 4755600.

The previous prime is 16218637. The next prime is 16218667. The reversal of 16218642 is 24681261.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1918 + ... + 6009.

It is an arithmetic number, because the mean of its divisors is an integer number (1141632).

Almost surely, 2^16218642 is an apocalyptic number.

16218642 is an abundant number, since it is smaller than the sum of its proper divisors (20313582).

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

16218642 is a wasteful number, since it uses less digits than its factorization.

16218642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7974.

The product of its digits is 4608, while the sum is 30.

The square root of 16218642 is about 4027.2375147240. The cubic root of 16218642 is about 253.1268196181.

The spelling of 16218642 in words is "sixteen million, two hundred eighteen thousand, six hundred forty-two".