18038434 has 8 divisors (see below), whose sum is σ = 27076140. Its totient is φ = 9013056.

The previous prime is 18038413. The next prime is 18038441. The reversal of 18038434 is 43483081.

It can be written as a sum of positive squares in 2 ways, for example, as 17682025 + 356409 = 4205^2 + 597^2 .

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 = 18038396 and 18038405.

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, 2902 + ... + 6670.

Almost surely, 2^18038434 is an apocalyptic number.

18038434 is a deficient number, since it is larger than the sum of its proper divisors (9037706).

18038434 is a wasteful number, since it uses less digits than its factorization.

18038434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6164.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 18038434 is about 4247.1677621681. The cubic root of 18038434 is about 262.2605356601.

The spelling of 18038434 in words is "eighteen million, thirty-eight thousand, four hundred thirty-four".