21013364763 has 32 divisors (see below), whose sum is σ = 31248866880. Its totient is φ = 13955950080.

The previous prime is 21013364747. The next prime is 21013364797. The reversal of 21013364763 is 36746331012.

21013364763 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 3 + 3 + 647 + 6 + 3 = 666.

It is not a de Polignac number, because 21013364763 - 2⁴ = 21013364747 is a prime.

It is a super-3 number, since 3×21013364763³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21013366763) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9813673 + ... + 9815813.

It is an arithmetic number, because the mean of its divisors is an integer number (976527090).

Almost surely, 2^21013364763 is an apocalyptic number.

21013364763 is a deficient number, since it is larger than the sum of its proper divisors (10235502117).

21013364763 is a wasteful number, since it uses less digits than its factorization.

21013364763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3356 (or 3350 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

Adding to 21013364763 its reverse (36746331012), we get a palindrome (57759695775).

The spelling of 21013364763 in words is "twenty-one billion, thirteen million, three hundred sixty-four thousand, seven hundred sixty-three".