21322441437 has 32 divisors (see below), whose sum is σ = 33726409344. Its totient is φ = 11833804800.

The previous prime is 21322441423. The next prime is 21322441457. The reversal of 21322441437 is 73414422312.

It is a happy number.

It is not a de Polignac number, because 21322441437 - 2¹⁰ = 21322440413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 21322441398 and 21322441407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322441457) 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, 492864 + ... + 534377.

It is an arithmetic number, because the mean of its divisors is an integer number (1053950292).

Almost surely, 2^21322441437 is an apocalyptic number.

It is an amenable number.

21322441437 is a deficient number, since it is larger than the sum of its proper divisors (12403967907).

21322441437 is a wasteful number, since it uses less digits than its factorization.

21322441437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027309.

The product of its digits is 32256, while the sum is 33.

Adding to 21322441437 its reverse (73414422312), we get a palindrome (94736863749).

It can be divided in two parts, 213 and 22441437, that added together give a triangular number (22441650 = T₆₆₉₉).

The spelling of 21322441437 in words is "twenty-one billion, three hundred twenty-two million, four hundred forty-one thousand, four hundred thirty-seven".