20166763 has 4 divisors (see below), whose sum is σ = 20271448. Its totient is φ = 20062080.

The previous prime is 20166721. The next prime is 20166767. The reversal of 20166763 is 36766102.

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

It is a cyclic number.

It is not a de Polignac number, because 20166763 - 2¹³ = 20158571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20166767) 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, 52053 + ... + 52438.

It is an arithmetic number, because the mean of its divisors is an integer number (5067862).

Almost surely, 2^20166763 is an apocalyptic number.

20166763 is a deficient number, since it is larger than the sum of its proper divisors (104685).

20166763 is a wasteful number, since it uses less digits than its factorization.

20166763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104684.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 20166763 is about 4490.7419208857. The cubic root of 20166763 is about 272.1941151476.

The spelling of 20166763 in words is "twenty million, one hundred sixty-six thousand, seven hundred sixty-three".