18946231 has 8 divisors (see below), whose sum is σ = 19275840. Its totient is φ = 18619392.

The previous prime is 18946171. The next prime is 18946237. The reversal of 18946231 is 13264981.

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 18946231 - 2¹⁹ = 18421943 is a prime.

It is a super-2 number, since 2×18946231² = 717919338210722, 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 (18946237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16626 + ... + 17728.

It is an arithmetic number, because the mean of its divisors is an integer number (2409480).

Almost surely, 2^18946231 is an apocalyptic number.

18946231 is a deficient number, since it is larger than the sum of its proper divisors (329609).

18946231 is a wasteful number, since it uses less digits than its factorization.

18946231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385.

The product of its digits is 10368, while the sum is 34.

The square root of 18946231 is about 4352.7268464722. The cubic root of 18946231 is about 266.5882125111.

The spelling of 18946231 in words is "eighteen million, nine hundred forty-six thousand, two hundred thirty-one".