20672166 has 8 divisors (see below), whose sum is σ = 41344344. Its totient is φ = 6890720.

The previous prime is 20672131. The next prime is 20672227. The reversal of 20672166 is 66127602.

It is a sphenic number, since it is the product of 3 distinct primes.

20672166 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1722675 + ... + 1722686.

It is an arithmetic number, because the mean of its divisors is an integer number (5168043).

Almost surely, 2^20672166 is an apocalyptic number.

20672166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20672166 is a wasteful number, since it uses less digits than its factorization.

20672166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3445366.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 20672166 is about 4546.6653714563. The cubic root of 20672166 is about 274.4492160558.

Adding to 20672166 its reverse (66127602), we get a palindrome (86799768).

The spelling of 20672166 in words is "twenty million, six hundred seventy-two thousand, one hundred sixty-six".