18121368 has 16 divisors (see below), whose sum is σ = 45303480. Its totient is φ = 6040448.

The previous prime is 18121351. The next prime is 18121387. The reversal of 18121368 is 86312181.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377505 + ... + 377552.

Almost surely, 2^18121368 is an apocalyptic number.

It is an amenable number.

18121368 is an abundant number, since it is smaller than the sum of its proper divisors (27182112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18121368 is a wasteful number, since it uses less digits than its factorization.

18121368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755066 (or 755062 counting only the distinct ones).

The product of its digits is 2304, while the sum is 30.

The square root of 18121368 is about 4256.9200133430. The cubic root of 18121368 is about 262.6618466768.

The spelling of 18121368 in words is "eighteen million, one hundred twenty-one thousand, three hundred sixty-eight".