20670766 has 8 divisors (see below), whose sum is σ = 31072320. Its totient is φ = 10313328.

The previous prime is 20670763. The next prime is 20670817. The reversal of 20670766 is 66707602.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20670763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9831 + ... + 11746.

It is an arithmetic number, because the mean of its divisors is an integer number (3884040).

Almost surely, 2^20670766 is an apocalyptic number.

20670766 is a deficient number, since it is larger than the sum of its proper divisors (10401554).

20670766 is a wasteful number, since it uses less digits than its factorization.

20670766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22058.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 20670766 is about 4546.5114098614. The cubic root of 20670766 is about 274.4430203242.

The spelling of 20670766 in words is "twenty million, six hundred seventy thousand, seven hundred sixty-six".