21244082763 has 16 divisors (see below), whose sum is σ = 29251747616. Its totient is φ = 13703800320.

The previous prime is 21244082737. The next prime is 21244082777. The reversal of 21244082763 is 36728044212.

It is a happy number.

It is not a de Polignac number, because 21244082763 - 2¹⁴ = 21244066379 is a prime.

It is a super-2 number, since 2×21244082763² (a number of 21 digits) contains 22 as substring.

It is the 145754-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21244082863) by changing a digit.

It is a nontrivial repunit in base 145753.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 508606 + ... + 548787.

It is an arithmetic number, because the mean of its divisors is an integer number (1828234226).

Almost surely, 2^21244082763 is an apocalyptic number.

21244082763 is a deficient number, since it is larger than the sum of its proper divisors (8007664853).

21244082763 is a wasteful number, since it uses less digits than its factorization.

21244082763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057614.

The product of its (nonzero) digits is 129024, while the sum is 39.

The spelling of 21244082763 in words is "twenty-one billion, two hundred forty-four million, eighty-two thousand, seven hundred sixty-three".