21434100244 has 6 divisors (see below), whose sum is σ = 37509675434. Its totient is φ = 10717050120.

The previous prime is 21434100229. The next prime is 21434100287. The reversal of 21434100244 is 44200143412.

It can be written as a sum of positive squares in only one way, i.e., 10909802500 + 10524297744 = 104450^2 + 102588^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2679262527 + ... + 2679262534.

Almost surely, 2^21434100244 is an apocalyptic number.

It is an amenable number.

21434100244 is a deficient number, since it is larger than the sum of its proper divisors (16075575190).

21434100244 is a wasteful number, since it uses less digits than its factorization.

21434100244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5358525065 (or 5358525063 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21434100244 its reverse (44200143412), we get a palindrome (65634243656).

The spelling of 21434100244 in words is "twenty-one billion, four hundred thirty-four million, one hundred thousand, two hundred forty-four".