18001026 has 24 divisors (see below), whose sum is σ = 39740220. Its totient is φ = 5886816.

The previous prime is 18000989. The next prime is 18001031. The reversal of 18001026 is 62010081.

It can be written as a sum of positive squares in 2 ways, for example, as 14814801 + 3186225 = 3849^2 + 1785^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8481 + ... + 10388.

Almost surely, 2^18001026 is an apocalyptic number.

18001026 is an abundant number, since it is smaller than the sum of its proper divisors (21739194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18001026 is a wasteful number, since it uses less digits than its factorization.

18001026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18930 (or 18927 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 18001026 is about 4242.7616006559. The cubic root of 18001026 is about 262.0791187349.

The spelling of 18001026 in words is "eighteen million, one thousand, twenty-six".