20465995 has 32 divisors (see below), whose sum is σ = 28071360. Its totient is φ = 14192640.

The previous prime is 20465993. The next prime is 20466001. The reversal of 20465995 is 59956402.

It is not a de Polignac number, because 20465995 - 2¹ = 20465993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20465993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181059 + ... + 181171.

It is an arithmetic number, because the mean of its divisors is an integer number (877230).

Almost surely, 2^20465995 is an apocalyptic number.

20465995 is a deficient number, since it is larger than the sum of its proper divisors (7605365).

20465995 is a wasteful number, since it uses less digits than its factorization.

20465995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 20465995 is about 4523.9357864585. The cubic root of 20465995 is about 273.5337721086.

The spelling of 20465995 in words is "twenty million, four hundred sixty-five thousand, nine hundred ninety-five".