21320000344 has 32 divisors (see below), whose sum is σ = 40213800000. Its totient is φ = 10596418560.

The previous prime is 21320000341. The next prime is 21320000347. The reversal of 21320000344 is 44300002312.

It is an interprime number because it is at equal distance from previous prime (21320000341) and next prime (21320000347).

It is a super-3 number, since 3×21320000344³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320000341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1963009 + ... + 1973839.

It is an arithmetic number, because the mean of its divisors is an integer number (1256681250).

Almost surely, 2^21320000344 is an apocalyptic number.

It is an amenable number.

21320000344 is a deficient number, since it is larger than the sum of its proper divisors (18893799656).

21320000344 is a wasteful number, since it uses less digits than its factorization.

21320000344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12283 (or 12279 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21320000344 its reverse (44300002312), we get a palindrome (65620002656).

The spelling of 21320000344 in words is "twenty-one billion, three hundred twenty million, three hundred forty-four", and thus it is an aban number.