21044132363 has 6 divisors (see below), whose sum is σ = 22354839876. Its totient is φ = 19806241952.

The previous prime is 21044132341. The next prime is 21044132377. The reversal of 21044132363 is 36323144012.

It is a de Polignac number, because none of the positive numbers 2^k-21044132363 is a prime.

It is a super-2 number, since 2×21044132363² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21044132303) 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 5 ways as a sum of consecutive naturals, for example, 36408245 + ... + 36408822.

It is an arithmetic number, because the mean of its divisors is an integer number (3725806646).

Almost surely, 2^21044132363 is an apocalyptic number.

21044132363 is a deficient number, since it is larger than the sum of its proper divisors (1310707513).

21044132363 is an equidigital number, since it uses as much as digits as its factorization.

21044132363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72817101 (or 72817084 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 21044132363 its reverse (36323144012), we get a palindrome (57367276375).

The spelling of 21044132363 in words is "twenty-one billion, forty-four million, one hundred thirty-two thousand, three hundred sixty-three".