20366766 has 24 divisors (see below), whose sum is σ = 50432304. Its totient is φ = 5819040.

The previous prime is 20366743. The next prime is 20366767. The reversal of 20366766 is 66766302.

It is a self number, because there is not a number n which added to its sum of digits gives 20366766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20366767) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80695 + ... + 80946.

It is an arithmetic number, because the mean of its divisors is an integer number (2101346).

Almost surely, 2^20366766 is an apocalyptic number.

20366766 is an abundant number, since it is smaller than the sum of its proper divisors (30065538).

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

20366766 is a wasteful number, since it uses less digits than its factorization.

20366766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161656 (or 161653 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 20366766 is about 4512.9553509868. The cubic root of 20366766 is about 273.0909812284.

The spelling of 20366766 in words is "twenty million, three hundred sixty-six thousand, seven hundred sixty-six".