18214261 has 8 divisors (see below), whose sum is σ = 19654880. Its totient is φ = 16779312.

The previous prime is 18214247. The next prime is 18214277. The reversal of 18214261 is 16241281.

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

It is a cyclic number.

It is not a de Polignac number, because 18214261 - 2¹¹ = 18212213 is a prime.

It is a super-2 number, since 2×18214261² = 663518607552242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18214201) 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, 7270 + ... + 9448.

It is an arithmetic number, because the mean of its divisors is an integer number (2456860).

Almost surely, 2^18214261 is an apocalyptic number.

It is an amenable number.

18214261 is a deficient number, since it is larger than the sum of its proper divisors (1440619).

18214261 is a wasteful number, since it uses less digits than its factorization.

18214261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2835.

The product of its digits is 768, while the sum is 25.

The square root of 18214261 is about 4267.8168892304. The cubic root of 18214261 is about 263.1098973508.

The spelling of 18214261 in words is "eighteen million, two hundred fourteen thousand, two hundred sixty-one".