20631408061025 has 24 divisors (see below), whose sum is σ = 25603023873024. Its totient is φ = 16492177468800.

The previous prime is 20631408060947. The next prime is 20631408061051. The reversal of 20631408061025 is 52016080413602.

It is not a de Polignac number, because 20631408061025 - 2³⁰ = 20630334319201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20631408061025.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 194203472 + ... + 194309678.

It is an arithmetic number, because the mean of its divisors is an integer number (1066792661376).

Almost surely, 2^{20631408061025} is an apocalyptic number.

20631408061025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20631408061025 is a deficient number, since it is larger than the sum of its proper divisors (4971615811999).

20631408061025 is a wasteful number, since it uses less digits than its factorization.

20631408061025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112241 (or 112236 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

Adding to 20631408061025 its reverse (52016080413602), we get a palindrome (72647488474627).

The spelling of 20631408061025 in words is "twenty trillion, six hundred thirty-one billion, four hundred eight million, sixty-one thousand, twenty-five".