18826231 has 2 divisors, whose sum is σ = 18826232. Its totient is φ = 18826230.

The previous prime is 18826211. The next prime is 18826243. The reversal of 18826231 is 13262881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18826231 - 2⁷ = 18826103 is a prime.

It is a super-2 number, since 2×18826231² = 708853947330722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18826193 and 18826202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18826201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9413115 + 9413116.

It is an arithmetic number, because the mean of its divisors is an integer number (9413116).

Almost surely, 2^18826231 is an apocalyptic number.

18826231 is a deficient number, since it is larger than the sum of its proper divisors (1).

18826231 is an equidigital number, since it uses as much as digits as its factorization.

18826231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 31.

The square root of 18826231 is about 4338.9204878633. The cubic root of 18826231 is about 266.0241889172.

The spelling of 18826231 in words is "eighteen million, eight hundred twenty-six thousand, two hundred thirty-one".