18223357 has 16 divisors (see below), whose sum is σ = 19464192. Its totient is φ = 17040240.

The previous prime is 18223349. The next prime is 18223409. The reversal of 18223357 is 75332281.

It is a cyclic number.

It is not a de Polignac number, because 18223357 - 2³ = 18223349 is a prime.

It is a Duffinian number.

Its product of digits (10080) is a multiple of the sum of its prime divisors (288).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18223307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143428 + ... + 143554.

It is an arithmetic number, because the mean of its divisors is an integer number (1216512).

Almost surely, 2^18223357 is an apocalyptic number.

It is an amenable number.

18223357 is a deficient number, since it is larger than the sum of its proper divisors (1240835).

18223357 is a wasteful number, since it uses less digits than its factorization.

18223357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288.

The product of its digits is 10080, while the sum is 31.

The square root of 18223357 is about 4268.8824064385. The cubic root of 18223357 is about 263.1536881173.

The spelling of 18223357 in words is "eighteen million, two hundred twenty-three thousand, three hundred fifty-seven".