20307166 has 8 divisors (see below), whose sum is σ = 33229944. Its totient is φ = 9230520.

The previous prime is 20307121. The next prime is 20307179. The reversal of 20307166 is 66170302.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20307166.

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, 461505 + ... + 461548.

It is an arithmetic number, because the mean of its divisors is an integer number (4153743).

Almost surely, 2^20307166 is an apocalyptic number.

20307166 is a deficient number, since it is larger than the sum of its proper divisors (12922778).

20307166 is a wasteful number, since it uses less digits than its factorization.

20307166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923066.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 20307166 is about 4506.3473013073. The cubic root of 20307166 is about 272.8243356400.

Adding to 20307166 its reverse (66170302), we get a palindrome (86477468).

The spelling of 20307166 in words is "twenty million, three hundred seven thousand, one hundred sixty-six".