20925764 has 12 divisors (see below), whose sum is σ = 38547600. Its totient is φ = 9912168.

The previous prime is 20925761. The next prime is 20925781. The reversal of 20925764 is 46752902.

It is not an unprimeable number, because it can be changed into a prime (20925761) 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 3 ways as a sum of consecutive naturals, for example, 137594 + ... + 137745.

It is an arithmetic number, because the mean of its divisors is an integer number (3212300).

Almost surely, 2^20925764 is an apocalyptic number.

It is an amenable number.

20925764 is a deficient number, since it is larger than the sum of its proper divisors (17621836).

20925764 is a wasteful number, since it uses less digits than its factorization.

20925764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275362 (or 275360 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 20925764 is about 4574.4687123206. The cubic root of 20925764 is about 275.5669361941.

The spelling of 20925764 in words is "twenty million, nine hundred twenty-five thousand, seven hundred sixty-four".