18228703 has 2 divisors, whose sum is σ = 18228704. Its totient is φ = 18228702.

The previous prime is 18228701. The next prime is 18228797. The reversal of 18228703 is 30782281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18228703 - 2¹ = 18228701 is a prime.

It is a super-2 number, since 2×18228703² = 664571226124418, which contains 22 as substring.

Together with 18228701, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18228701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9114351 + 9114352.

It is an arithmetic number, because the mean of its divisors is an integer number (9114352).

Almost surely, 2^18228703 is an apocalyptic number.

18228703 is a deficient number, since it is larger than the sum of its proper divisors (1).

18228703 is an equidigital number, since it uses as much as digits as its factorization.

18228703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 18228703 is about 4269.5085197245. The cubic root of 18228703 is about 263.1794185041.

The spelling of 18228703 in words is "eighteen million, two hundred twenty-eight thousand, seven hundred three".