18834407 has 4 divisors (see below), whose sum is σ = 18846936. Its totient is φ = 18821880.

The previous prime is 18834397. The next prime is 18834433. The reversal of 18834407 is 70443881.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70443881 = 677 ⋅104053.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18834407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18834467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3644 + ... + 7137.

It is an arithmetic number, because the mean of its divisors is an integer number (4711734).

Almost surely, 2^18834407 is an apocalyptic number.

18834407 is a deficient number, since it is larger than the sum of its proper divisors (12529).

18834407 is a wasteful number, since it uses less digits than its factorization.

18834407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12528.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 18834407 is about 4339.8625554273. The cubic root of 18834407 is about 266.0626936854.

The spelling of 18834407 in words is "eighteen million, eight hundred thirty-four thousand, four hundred seven".