20066984 has 32 divisors (see below), whose sum is σ = 43182720. Its totient is φ = 8563776.

The previous prime is 20066947. The next prime is 20066989. The reversal of 20066984 is 48966002.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20066989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15797 + ... + 17019.

It is an arithmetic number, because the mean of its divisors is an integer number (1349460).

Almost surely, 2^20066984 is an apocalyptic number.

It is an amenable number.

20066984 is an abundant number, since it is smaller than the sum of its proper divisors (23115736).

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

20066984 is a wasteful number, since it uses less digits than its factorization.

20066984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529 (or 1525 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 20066984 is about 4479.6187337763. The cubic root of 20066984 is about 271.7444615591.

The spelling of 20066984 in words is "twenty million, sixty-six thousand, nine hundred eighty-four".