20928195 has 12 divisors (see below), whose sum is σ = 36275616. Its totient is φ = 11161680.

The previous prime is 20928191. The next prime is 20928197. The reversal of 20928195 is 59182902.

It is not a de Polignac number, because 20928195 - 2² = 20928191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20928191) 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, 232491 + ... + 232580.

It is an arithmetic number, because the mean of its divisors is an integer number (3022968).

Almost surely, 2^20928195 is an apocalyptic number.

20928195 is a deficient number, since it is larger than the sum of its proper divisors (15347421).

20928195 is a wasteful number, since it uses less digits than its factorization.

20928195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465082 (or 465079 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 20928195 is about 4574.7344185209. The cubic root of 20928195 is about 275.5776068883.

The spelling of 20928195 in words is "twenty million, nine hundred twenty-eight thousand, one hundred ninety-five".