18026020 has 48 divisors (see below), whose sum is σ = 39916800. Its totient is φ = 6824576.

The previous prime is 18026009. The next prime is 18026027. The reversal of 18026020 is 2062081.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18026027) 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, 68409 + ... + 68671.

It is an arithmetic number, because the mean of its divisors is an integer number (831600).

Almost surely, 2^18026020 is an apocalyptic number.

18026020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18026020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19958400).

18026020 is an abundant number, since it is smaller than the sum of its proper divisors (21890780).

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

18026020 is a wasteful number, since it uses less digits than its factorization.

18026020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 18026020 is about 4245.7060661332. The cubic root of 18026020 is about 262.2003595304.

It can be divided in two parts, 1 and 8026020, that added together give a triangular number (8026021 = T₄₀₀₆).

The spelling of 18026020 in words is "eighteen million, twenty-six thousand, twenty".