18838634 has 16 divisors (see below), whose sum is σ = 29144448. Its totient is φ = 9127872.

The previous prime is 18838613. The next prime is 18838649. The reversal of 18838634 is 43683881.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18838591 and 18838600.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9122 + ... + 10994.

It is an arithmetic number, because the mean of its divisors is an integer number (1821528).

Almost surely, 2^18838634 is an apocalyptic number.

18838634 is a deficient number, since it is larger than the sum of its proper divisors (10305814).

18838634 is a wasteful number, since it uses less digits than its factorization.

18838634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029.

The product of its digits is 110592, while the sum is 41.

The square root of 18838634 is about 4340.3495250959. The cubic root of 18838634 is about 266.0825963186.

The spelling of 18838634 in words is "eighteen million, eight hundred thirty-eight thousand, six hundred thirty-four".