20750766 has 16 divisors (see below), whose sum is σ = 41883600. Its totient is φ = 6853248.

The previous prime is 20750701. The next prime is 20750767. The reversal of 20750766 is 66705702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20750767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15211 + ... + 16518.

It is an arithmetic number, because the mean of its divisors is an integer number (2617725).

Almost surely, 2^20750766 is an apocalyptic number.

20750766 is an abundant number, since it is smaller than the sum of its proper divisors (21132834).

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

20750766 is a wasteful number, since it uses less digits than its factorization.

20750766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31843.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 20750766 is about 4555.3008682194. The cubic root of 20750766 is about 274.7966143546.

The spelling of 20750766 in words is "twenty million, seven hundred fifty thousand, seven hundred sixty-six".