21320444034 has 24 divisors (see below), whose sum is σ = 46204104492. Its totient is φ = 7105305600.

The previous prime is 21320444009. The next prime is 21320444059. The reversal of 21320444034 is 43044402312.

It is a happy number.

21320444034 is a `hidden beast` number, since 2 + 13 + 204 + 440 + 3 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (21320444009) and next prime (21320444059).

It can be written as a sum of positive squares in 2 ways, for example, as 19581804225 + 1738639809 = 139935^2 + 41697^2 .

It is a super-2 number, since 2×21320444034² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21320443989 and 21320444007.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36939 + ... + 209774.

Almost surely, 2^21320444034 is an apocalyptic number.

21320444034 is an abundant number, since it is smaller than the sum of its proper divisors (24883660458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21320444034 is a wasteful number, since it uses less digits than its factorization.

21320444034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251522 (or 251519 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 21320444034 its reverse (43044402312), we get a palindrome (64364846346).

The spelling of 21320444034 in words is "twenty-one billion, three hundred twenty million, four hundred forty-four thousand, thirty-four".