21434333444 has 6 divisors (see below), whose sum is σ = 37510083534. Its totient is φ = 10717166720.

The previous prime is 21434333383. The next prime is 21434333497. The reversal of 21434333444 is 44433343412.

It can be written as a sum of positive squares in only one way, i.e., 12800207044 + 8634126400 = 113138^2 + 92920^2 .

It is a super-2 number, since 2×21434333444² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2679291677 + ... + 2679291684.

It is an arithmetic number, because the mean of its divisors is an integer number (6251680589).

Almost surely, 2^21434333444 is an apocalyptic number.

It is an amenable number.

21434333444 is a deficient number, since it is larger than the sum of its proper divisors (16075750090).

21434333444 is a wasteful number, since it uses less digits than its factorization.

21434333444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5358583365 (or 5358583363 counting only the distinct ones).

The product of its digits is 165888, while the sum is 35.

Adding to 21434333444 its reverse (44433343412), we get a palindrome (65867676856).

The spelling of 21434333444 in words is "twenty-one billion, four hundred thirty-four million, three hundred thirty-three thousand, four hundred forty-four".