20646000024226 has 4 divisors (see below), whose sum is σ = 30969000036342. Its totient is φ = 10323000012112.

The previous prime is 20646000024191. The next prime is 20646000024229. The reversal of 20646000024226 is 62242000064602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15390329148601 + 5255670875625 = 3923051^2 + 2292525^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20646000024191 and 20646000024200.

It is not an unprimeable number, because it can be changed into a prime (20646000024229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5161500006055 + ... + 5161500006058.

Almost surely, 2^{20646000024226} is an apocalyptic number.

20646000024226 is a deficient number, since it is larger than the sum of its proper divisors (10323000012116).

20646000024226 is a wasteful number, since it uses less digits than its factorization.

20646000024226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10323000012115.

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 20646000024226 its reverse (62242000064602), we get a palindrome (82888000088828).

The spelling of 20646000024226 in words is "twenty trillion, six hundred forty-six billion, twenty-four thousand, two hundred twenty-six".