18421827 has 8 divisors (see below), whose sum is σ = 25630464. Its totient is φ = 11747208.

The previous prime is 18421813. The next prime is 18421841. The reversal of 18421827 is 72812481.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18421813) and next prime (18421841).

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

It is not a de Polignac number, because 18421827 - 2¹⁸ = 18159683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18421867) 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, 133423 + ... + 133560.

It is an arithmetic number, because the mean of its divisors is an integer number (3203808).

Almost surely, 2^18421827 is an apocalyptic number.

18421827 is a deficient number, since it is larger than the sum of its proper divisors (7208637).

18421827 is a wasteful number, since it uses less digits than its factorization.

18421827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267009.

The product of its digits is 7168, while the sum is 33.

The square root of 18421827 is about 4292.0655866377. The cubic root of 18421827 is about 264.1055735928.

The spelling of 18421827 in words is "eighteen million, four hundred twenty-one thousand, eight hundred twenty-seven".