20925590609 has 16 divisors (see below), whose sum is σ = 26516743296. Its totient is φ = 16038345600.

The previous prime is 20925590591. The next prime is 20925590629. The reversal of 20925590609 is 90609552902.

It is a cyclic number.

It is not a de Polignac number, because 20925590609 - 2⁸ = 20925590353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20925590629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2222852 + ... + 2232245.

It is an arithmetic number, because the mean of its divisors is an integer number (1657296456).

Almost surely, 2^20925590609 is an apocalyptic number.

It is an amenable number.

20925590609 is a deficient number, since it is larger than the sum of its proper divisors (5591152687).

20925590609 is a wasteful number, since it uses less digits than its factorization.

20925590609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4455176.

The product of its (nonzero) digits is 437400, while the sum is 47.

The spelling of 20925590609 in words is "twenty billion, nine hundred twenty-five million, five hundred ninety thousand, six hundred nine".