18120634 has 16 divisors (see below), whose sum is σ = 31239936. Its totient is φ = 7722000.

The previous prime is 18120607. The next prime is 18120637. The reversal of 18120634 is 43602181.

It is a junction number, because it is equal to n+sod(n) for n = 18120599 and 18120608.

It is not an unprimeable number, because it can be changed into a prime (18120637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1042 + ... + 6109.

It is an arithmetic number, because the mean of its divisors is an integer number (1952496).

Almost surely, 2^18120634 is an apocalyptic number.

18120634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18120634 is a deficient number, since it is larger than the sum of its proper divisors (13119302).

18120634 is a wasteful number, since it uses less digits than its factorization.

18120634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7341.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 18120634 is about 4256.8337999034. The cubic root of 18120634 is about 262.6583002852.

The spelling of 18120634 in words is "eighteen million, one hundred twenty thousand, six hundred thirty-four".