21322441436 has 12 divisors (see below), whose sum is σ = 37644488112. Its totient is φ = 10566873408.

The previous prime is 21322441423. The next prime is 21322441457. The reversal of 21322441436 is 63414422312.

It is a congruent number.

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, 23586320 + ... + 23587223.

It is an arithmetic number, because the mean of its divisors is an integer number (3137040676).

Almost surely, 2^21322441436 is an apocalyptic number.

It is an amenable number.

21322441436 is a deficient number, since it is larger than the sum of its proper divisors (16322046676).

21322441436 is a wasteful number, since it uses less digits than its factorization.

21322441436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47173660 (or 47173658 counting only the distinct ones).

The product of its digits is 27648, while the sum is 32.

Adding to 21322441436 its reverse (63414422312), we get a palindrome (84736863748).

The spelling of 21322441436 in words is "twenty-one billion, three hundred twenty-two million, four hundred forty-one thousand, four hundred thirty-six".