20825645075 has 12 divisors (see below), whose sum is σ = 25833106248. Its totient is φ = 16654512000.

The previous prime is 20825645069. The next prime is 20825645149. The reversal of 20825645075 is 57054652802.

It is a de Polignac number, because none of the positive numbers 2^k-20825645075 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78677 + ... + 218726.

It is an arithmetic number, because the mean of its divisors is an integer number (2152758854).

Almost surely, 2^20825645075 is an apocalyptic number.

20825645075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20825645075 is a deficient number, since it is larger than the sum of its proper divisors (5007461173).

20825645075 is a wasteful number, since it uses less digits than its factorization.

20825645075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300214 (or 300209 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 44.

The spelling of 20825645075 in words is "twenty billion, eight hundred twenty-five million, six hundred forty-five thousand, seventy-five".