18724094 has 4 divisors (see below), whose sum is σ = 28086144. Its totient is φ = 9362046.

The previous prime is 18724091. The next prime is 18724103. The reversal of 18724094 is 49042781.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×18724094² = 701183392241672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18724091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4681022 + ... + 4681025.

It is an arithmetic number, because the mean of its divisors is an integer number (7021536).

Almost surely, 2^18724094 is an apocalyptic number.

18724094 is a deficient number, since it is larger than the sum of its proper divisors (9362050).

18724094 is an equidigital number, since it uses as much as digits as its factorization.

18724094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9362049.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 18724094 is about 4327.1346177349. The cubic root of 18724094 is about 265.5422337568.

The spelling of 18724094 in words is "eighteen million, seven hundred twenty-four thousand, ninety-four".