20166146 has 48 divisors (see below), whose sum is σ = 41368320. Its totient is φ = 7247520.

The previous prime is 20166143. The next prime is 20166161. The reversal of 20166146 is 64166102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (20166143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13295 + ... + 14733.

It is an arithmetic number, because the mean of its divisors is an integer number (861840).

Almost surely, 2^20166146 is an apocalyptic number.

20166146 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20166146 is an abundant number, since it is smaller than the sum of its proper divisors (21202174).

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

20166146 is a wasteful number, since it uses less digits than its factorization.

20166146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479 (or 1472 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20166146 is about 4490.6732234711. The cubic root of 20166146 is about 272.1913392025.

The spelling of 20166146 in words is "twenty million, one hundred sixty-six thousand, one hundred forty-six".