18121066 has 8 divisors (see below), whose sum is σ = 27219780. Its totient is φ = 9047808.

The previous prime is 18121043. The next prime is 18121067. The reversal of 18121066 is 66012181.

It can be written as a sum of positive squares in 2 ways, for example, as 17514225 + 606841 = 4185^2 + 779^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18121066.

It is not an unprimeable number, because it can be changed into a prime (18121067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4471 + ... + 7498.

Almost surely, 2^18121066 is an apocalyptic number.

18121066 is a deficient number, since it is larger than the sum of its proper divisors (9098714).

18121066 is a wasteful number, since it uses less digits than its factorization.

18121066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12728.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 18121066 is about 4256.8845415397. The cubic root of 18121066 is about 262.6603875463.

The spelling of 18121066 in words is "eighteen million, one hundred twenty-one thousand, sixty-six".