21126463226636 has 24 divisors (see below), whose sum is σ = 37758372523200. Its totient is φ = 10338362008832.

The previous prime is 21126463226621. The next prime is 21126463226639. The reversal of 21126463226636 is 63662236462112.

It is a super-3 number, since 3×21126463226636³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21126463226639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16831790 + ... + 18043338.

It is an arithmetic number, because the mean of its divisors is an integer number (1573265521800).

Almost surely, 2^{21126463226636} is an apocalyptic number.

It is an amenable number.

21126463226636 is a deficient number, since it is larger than the sum of its proper divisors (16631909296564).

21126463226636 is a wasteful number, since it uses less digits than its factorization.

21126463226636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304353 (or 1304351 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 50.

Adding to 21126463226636 its reverse (63662236462112), we get a palindrome (84788699688748).

The spelling of 21126463226636 in words is "twenty-one trillion, one hundred twenty-six billion, four hundred sixty-three million, two hundred twenty-six thousand, six hundred thirty-six".