18213962 has 8 divisors (see below), whose sum is σ = 29422596. Its totient is φ = 8406432.

The previous prime is 18213947. The next prime is 18213967. The reversal of 18213962 is 26931281.

It can be written as a sum of positive squares in 2 ways, for example, as 14523721 + 3690241 = 3811^2 + 1921^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18213967) 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, 350243 + ... + 350294.

Almost surely, 2^18213962 is an apocalyptic number.

18213962 is a deficient number, since it is larger than the sum of its proper divisors (11208634).

18213962 is a wasteful number, since it uses less digits than its factorization.

18213962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700552.

The product of its digits is 5184, while the sum is 32.

The square root of 18213962 is about 4267.7818594675. The cubic root of 18213962 is about 263.1084576312.

The spelling of 18213962 in words is "eighteen million, two hundred thirteen thousand, nine hundred sixty-two".