18245493 has 30 divisors (see below), whose sum is σ = 31712406. Its totient is φ = 10423728.

The previous prime is 18245489. The next prime is 18245501. The reversal of 18245493 is 39454281.

It can be written as a sum of positive squares in only one way, i.e., 11573604 + 6671889 = 3402^2 + 2583^2 .

It is not a de Polignac number, because 18245493 - 2² = 18245489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18245413) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1671 + ... + 6267.

Almost surely, 2^18245493 is an apocalyptic number.

It is an amenable number.

18245493 is a deficient number, since it is larger than the sum of its proper divisors (13466913).

18245493 is an equidigital number, since it uses as much as digits as its factorization.

18245493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4623 (or 4607 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 18245493 is about 4271.4743356364. The cubic root of 18245493 is about 263.2601963567.

The spelling of 18245493 in words is "eighteen million, two hundred forty-five thousand, four hundred ninety-three".