21102433444 has 12 divisors (see below), whose sum is σ = 37002680064. Its totient is φ = 10530239144.

The previous prime is 21102433409. The next prime is 21102433447. The reversal of 21102433444 is 44433420112.

It is a super-2 number, since 2×21102433444² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21102433447) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 5242132 + ... + 5246155.

It is an arithmetic number, because the mean of its divisors is an integer number (3083556672).

Almost surely, 2^21102433444 is an apocalyptic number.

It is an amenable number.

21102433444 is a deficient number, since it is larger than the sum of its proper divisors (15900246620).

21102433444 is a wasteful number, since it uses less digits than its factorization.

21102433444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10488794 (or 10488792 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21102433444 its reverse (44433420112), we get a palindrome (65535853556).

The spelling of 21102433444 in words is "twenty-one billion, one hundred two million, four hundred thirty-three thousand, four hundred forty-four".