20066385 has 16 divisors (see below), whose sum is σ = 32469120. Its totient is φ = 10581120.

The previous prime is 20066369. The next prime is 20066399. The reversal of 20066385 is 58366002.

It is not a de Polignac number, because 20066385 - 2⁴ = 20066369 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6181 + ... + 8850.

It is an arithmetic number, because the mean of its divisors is an integer number (2029320).

Almost surely, 2^20066385 is an apocalyptic number.

It is an amenable number.

20066385 is a deficient number, since it is larger than the sum of its proper divisors (12402735).

20066385 is a wasteful number, since it uses less digits than its factorization.

20066385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15128.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 20066385 is about 4479.5518749089. The cubic root of 20066385 is about 271.7417576725.

The spelling of 20066385 in words is "twenty million, sixty-six thousand, three hundred eighty-five".