18081826 has 32 divisors (see below), whose sum is σ = 32372352. Its totient is φ = 7413120.

The previous prime is 18081821. The next prime is 18081853. The reversal of 18081826 is 62818081.

It is a junction number, because it is equal to n+sod(n) for n = 18081791 and 18081800.

It is not an unprimeable number, because it can be changed into a prime (18081821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34446 + ... + 34966.

It is an arithmetic number, because the mean of its divisors is an integer number (1011636).

Almost surely, 2^18081826 is an apocalyptic number.

18081826 is a deficient number, since it is larger than the sum of its proper divisors (14290526).

18081826 is a wasteful number, since it uses less digits than its factorization.

18081826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634.

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 18081826 is about 4252.2730392109. The cubic root of 18081826 is about 262.4706591544.

The spelling of 18081826 in words is "eighteen million, eighty-one thousand, eight hundred twenty-six".