20066975 has 12 divisors (see below), whose sum is σ = 25127856. Its totient is φ = 15895680.

The previous prime is 20066947. The next prime is 20066989. The reversal of 20066975 is 57966002.

It is not a de Polignac number, because 20066975 - 2⁶ = 20066911 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1322 + ... + 6471.

It is an arithmetic number, because the mean of its divisors is an integer number (2093988).

Almost surely, 2^20066975 is an apocalyptic number.

20066975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20066975 is a deficient number, since it is larger than the sum of its proper divisors (5060881).

20066975 is a wasteful number, since it uses less digits than its factorization.

20066975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7906 (or 7901 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 20066975 is about 4479.6177292265. The cubic root of 20066975 is about 271.7444209335.

The spelling of 20066975 in words is "twenty million, sixty-six thousand, nine hundred seventy-five".