18223801 has 4 divisors (see below), whose sum is σ = 18232704. Its totient is φ = 18214900.

The previous prime is 18223781. The next prime is 18223817. The reversal of 18223801 is 10832281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18223801 - 2⁵ = 18223769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18223841) 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 3 ways as a sum of consecutive naturals, for example, 336 + ... + 6046.

It is an arithmetic number, because the mean of its divisors is an integer number (4558176).

Almost surely, 2^18223801 is an apocalyptic number.

It is an amenable number.

18223801 is a deficient number, since it is larger than the sum of its proper divisors (8903).

18223801 is an equidigital number, since it uses as much as digits as its factorization.

18223801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8902.

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

The square root of 18223801 is about 4268.9344103652. The cubic root of 18223801 is about 263.1558252883.

The spelling of 18223801 in words is "eighteen million, two hundred twenty-three thousand, eight hundred one".