20456766 has 32 divisors (see below), whose sum is σ = 49593600. Its totient is φ = 6198840.

The previous prime is 20456759. The next prime is 20456767. The reversal of 20456766 is 66765402.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20456766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20456767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16626 + ... + 17813.

It is an arithmetic number, because the mean of its divisors is an integer number (1549800).

Almost surely, 2^20456766 is an apocalyptic number.

20456766 is an abundant number, since it is smaller than the sum of its proper divisors (29136834).

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

20456766 is a wasteful number, since it uses less digits than its factorization.

20456766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34461 (or 34455 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 20456766 is about 4522.9156525410. The cubic root of 20456766 is about 273.4926498676.

The spelling of 20456766 in words is "twenty million, four hundred fifty-six thousand, seven hundred sixty-six".