20056766 has 4 divisors (see below), whose sum is σ = 30085152. Its totient is φ = 10028382.

The previous prime is 20056703. The next prime is 20056769. The reversal of 20056766 is 66765002.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20056769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5014190 + ... + 5014193.

It is an arithmetic number, because the mean of its divisors is an integer number (7521288).

Almost surely, 2^20056766 is an apocalyptic number.

20056766 is a deficient number, since it is larger than the sum of its proper divisors (10028386).

20056766 is a wasteful number, since it uses less digits than its factorization.

20056766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10028385.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 20056766 is about 4478.4780897086. The cubic root of 20056766 is about 271.6983301237.

The spelling of 20056766 in words is "twenty million, fifty-six thousand, seven hundred sixty-six".