20816330025 has 12 divisors (see below), whose sum is σ = 34416332432. Its totient is φ = 11102042640.

The previous prime is 20816329993. The next prime is 20816330063. The reversal of 20816330025 is 52003361802.

It is not a de Polignac number, because 20816330025 - 2⁵ = 20816329993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20816329974 and 20816330001.

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, 138775459 + ... + 138775608.

Almost surely, 2^20816330025 is an apocalyptic number.

20816330025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20816330025 is a deficient number, since it is larger than the sum of its proper divisors (13600002407).

20816330025 is a wasteful number, since it uses less digits than its factorization.

20816330025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277551080 (or 277551075 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 20816330025 its reverse (52003361802), we get a palindrome (72819691827).

The spelling of 20816330025 in words is "twenty billion, eight hundred sixteen million, three hundred thirty thousand, twenty-five".