21340033444 has 12 divisors (see below), whose sum is σ = 37354198000. Its totient is φ = 10667405448.

The previous prime is 21340033433. The next prime is 21340033459. The reversal of 21340033444 is 44433004312.

It is a super-2 number, since 2×21340033444² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 634374 + ... + 667165.

Almost surely, 2^21340033444 is an apocalyptic number.

It is an amenable number.

21340033444 is a deficient number, since it is larger than the sum of its proper divisors (16014164556).

21340033444 is a wasteful number, since it uses less digits than its factorization.

21340033444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305642 (or 1305640 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21340033444 its reverse (44433004312), we get a palindrome (65773037756).

The spelling of 21340033444 in words is "twenty-one billion, three hundred forty million, thirty-three thousand, four hundred forty-four".