18036634 has 32 divisors (see below), whose sum is σ = 33975936. Its totient is φ = 6976320.

The previous prime is 18036607. The next prime is 18036653. The reversal of 18036634 is 43663081.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 18036596 and 18036605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26304 + ... + 26980.

It is an arithmetic number, because the mean of its divisors is an integer number (1061748).

Almost surely, 2^18036634 is an apocalyptic number.

18036634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18036634 is a deficient number, since it is larger than the sum of its proper divisors (15939302).

18036634 is a wasteful number, since it uses less digits than its factorization.

18036634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 18036634 is about 4246.9558509596. The cubic root of 18036634 is about 262.2518119784.

The spelling of 18036634 in words is "eighteen million, thirty-six thousand, six hundred thirty-four".