18814438 has 8 divisors (see below), whose sum is σ = 28395288. Its totient is φ = 9349344.

The previous prime is 18814423. The next prime is 18814469. The reversal of 18814438 is 83441881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 18814397 and 18814406.

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, 28531 + ... + 29182.

It is an arithmetic number, because the mean of its divisors is an integer number (3549411).

Almost surely, 2^18814438 is an apocalyptic number.

18814438 is a deficient number, since it is larger than the sum of its proper divisors (9580850).

18814438 is a wasteful number, since it uses less digits than its factorization.

18814438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57878.

The product of its digits is 24576, while the sum is 37.

The square root of 18814438 is about 4337.5612963969. The cubic root of 18814438 is about 265.9686302917.

The spelling of 18814438 in words is "eighteen million, eight hundred fourteen thousand, four hundred thirty-eight".