21344332412 has 48 divisors (see below), whose sum is σ = 41764031232. Its totient is φ = 9478218240.

The previous prime is 21344332411. The next prime is 21344332433. The reversal of 21344332412 is 21423344312.

It is a super-2 number, since 2×21344332412² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344332411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240608 + ... + 317144.

It is an arithmetic number, because the mean of its divisors is an integer number (870083984).

Almost surely, 2^21344332412 is an apocalyptic number.

It is an amenable number.

21344332412 is a deficient number, since it is larger than the sum of its proper divisors (20419698820).

21344332412 is a wasteful number, since it uses less digits than its factorization.

21344332412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76758 (or 76756 counting only the distinct ones).

The product of its digits is 13824, while the sum is 29.

Adding to 21344332412 its reverse (21423344312), we get a palindrome (42767676724).

The spelling of 21344332412 in words is "twenty-one billion, three hundred forty-four million, three hundred thirty-two thousand, four hundred twelve".