18681026 has 16 divisors (see below), whose sum is σ = 34488384. Its totient is φ = 7390224.

The previous prime is 18680999. The next prime is 18681029. The reversal of 18681026 is 62018681.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18680983 and 18681001.

It is not an unprimeable number, because it can be changed into a prime (18681029) 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, 51140 + ... + 51503.

It is an arithmetic number, because the mean of its divisors is an integer number (2155524).

Almost surely, 2^18681026 is an apocalyptic number.

18681026 is a deficient number, since it is larger than the sum of its proper divisors (15807358).

18681026 is a wasteful number, since it uses less digits than its factorization.

18681026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102665.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 18681026 is about 4322.1552494097. The cubic root of 18681026 is about 265.3384828649.

The spelling of 18681026 in words is "eighteen million, six hundred eighty-one thousand, twenty-six".