21332220453 has 32 divisors (see below), whose sum is σ = 32071680000. Its totient is φ = 14011476336.

The previous prime is 21332220421. The next prime is 21332220521. The reversal of 21332220453 is 35402223312.

It is not a de Polignac number, because 21332220453 - 2⁵ = 21332220421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21332220253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1011268 + ... + 1032146.

It is an arithmetic number, because the mean of its divisors is an integer number (1002240000).

Almost surely, 2^21332220453 is an apocalyptic number.

It is an amenable number.

21332220453 is a deficient number, since it is larger than the sum of its proper divisors (10739459547).

21332220453 is a wasteful number, since it uses less digits than its factorization.

21332220453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21446 (or 21440 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 21332220453 its reverse (35402223312), we get a palindrome (56734443765).

The spelling of 21332220453 in words is "twenty-one billion, three hundred thirty-two million, two hundred twenty thousand, four hundred fifty-three".