21636263612 has 12 divisors (see below), whose sum is σ = 37865755536. Its totient is φ = 10817476320.

The previous prime is 21636263611. The next prime is 21636263641.

It is a happy number.

21636263612 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21636263611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85433 + ... + 224880.

It is an arithmetic number, because the mean of its divisors is an integer number (3155479628).

Almost surely, 2^21636263612 is an apocalyptic number.

It is an amenable number.

21636263612 is a deficient number, since it is larger than the sum of its proper divisors (16229491924).

21636263612 is a wasteful number, since it uses less digits than its factorization.

21636263612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327748 (or 327746 counting only the distinct ones).

The product of its digits is 93312, while the sum is 38.

The spelling of 21636263612 in words is "twenty-one billion, six hundred thirty-six million, two hundred sixty-three thousand, six hundred twelve".