20066889 has 16 divisors (see below), whose sum is σ = 27852800. Its totient is φ = 12836880.

The previous prime is 20066881. The next prime is 20066899. The reversal of 20066889 is 98866002.

It is not a de Polignac number, because 20066889 - 2³ = 20066881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20066881) 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, 10962 + ... + 12660.

It is an arithmetic number, because the mean of its divisors is an integer number (1740800).

Almost surely, 2^20066889 is an apocalyptic number.

It is an amenable number.

20066889 is a deficient number, since it is larger than the sum of its proper divisors (7785911).

20066889 is a wasteful number, since it uses less digits than its factorization.

20066889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 20066889 is about 4479.6081301828. The cubic root of 20066889 is about 271.7440327326.

The spelling of 20066889 in words is "twenty million, sixty-six thousand, eight hundred eighty-nine".