21264012846763 has 4 divisors (see below), whose sum is σ = 21264024525408. Its totient is φ = 21264001168120.

The previous prime is 21264012846721. The next prime is 21264012846799. The reversal of 21264012846763 is 36764821046212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21264012846763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21264012846763.

It is not an unprimeable number, because it can be changed into a prime (21264012846163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2453956 + ... + 6967777.

It is an arithmetic number, because the mean of its divisors is an integer number (5316006131352).

Almost surely, 2^{21264012846763} is an apocalyptic number.

21264012846763 is a deficient number, since it is larger than the sum of its proper divisors (11678645).

21264012846763 is an equidigital number, since it uses as much as digits as its factorization.

21264012846763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11678644.

The product of its (nonzero) digits is 4644864, while the sum is 52.

The spelling of 21264012846763 in words is "twenty-one trillion, two hundred sixty-four billion, twelve million, eight hundred forty-six thousand, seven hundred sixty-three".