20825534897 has 32 divisors (see below), whose sum is σ = 22959417600. Its totient is φ = 18827640832.

The previous prime is 20825534881. The next prime is 20825534911. The reversal of 20825534897 is 79843552802.

It is a cyclic number.

It is not a de Polignac number, because 20825534897 - 2⁴ = 20825534881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20825534867) 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 31 ways as a sum of consecutive naturals, for example, 6254129 + ... + 6257457.

It is an arithmetic number, because the mean of its divisors is an integer number (717481800).

Almost surely, 2^20825534897 is an apocalyptic number.

It is an amenable number.

20825534897 is a deficient number, since it is larger than the sum of its proper divisors (2133882703).

20825534897 is a wasteful number, since it uses less digits than its factorization.

20825534897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3577.

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 20825534897 in words is "twenty billion, eight hundred twenty-five million, five hundred thirty-four thousand, eight hundred ninety-seven".