20776687064225 has 12 divisors (see below), whose sum is σ = 25763243674476. Its totient is φ = 16621251770880.

The previous prime is 20776687064153. The next prime is 20776687064233. The reversal of 20776687064225 is 52246078667702.

It can be written as a sum of positive squares in 6 ways, for example, as 67261385104 + 20709425679121 = 259348^2 + 4550761^2 .

It is not a de Polignac number, because 20776687064225 - 2⁸ = 20776687063969 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, 2044889 + ... + 6762761.

It is an arithmetic number, because the mean of its divisors is an integer number (2146936972873).

Almost surely, 2^{20776687064225} is an apocalyptic number.

20776687064225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20776687064225 is a deficient number, since it is larger than the sum of its proper divisors (4986556610251).

20776687064225 is a wasteful number, since it uses less digits than its factorization.

20776687064225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4894036 (or 4894031 counting only the distinct ones).

The product of its (nonzero) digits is 94832640, while the sum is 62.

The spelling of 20776687064225 in words is "twenty trillion, seven hundred seventy-six billion, six hundred eighty-seven million, sixty-four thousand, two hundred twenty-five".