21141315532 has 24 divisors (see below), whose sum is σ = 39392483760. Its totient is φ = 9893268480.

The previous prime is 21141315529. The next prime is 21141315539. The reversal of 21141315532 is 23551314112.

It is a self number, because there is not a number n which added to its sum of digits gives 21141315532.

It is not an unprimeable number, because it can be changed into a prime (21141315539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 856269 + ... + 880612.

It is an arithmetic number, because the mean of its divisors is an integer number (1641353490).

Almost surely, 2^21141315532 is an apocalyptic number.

It is an amenable number.

21141315532 is a deficient number, since it is larger than the sum of its proper divisors (18251168228).

21141315532 is a wasteful number, since it uses less digits than its factorization.

21141315532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1737081 (or 1737079 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

Adding to 21141315532 its reverse (23551314112), we get a palindrome (44692629644).

The spelling of 21141315532 in words is "twenty-one billion, one hundred forty-one million, three hundred fifteen thousand, five hundred thirty-two".