21041344532 has 24 divisors (see below), whose sum is σ = 39842800032. Its totient is φ = 9665359200.

The previous prime is 21041344459. The next prime is 21041344543. The reversal of 21041344532 is 23544314012.

It is a junction number, because it is equal to n+sod(n) for n = 21041344495 and 21041344504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 947894 + ... + 969837.

It is an arithmetic number, because the mean of its divisors is an integer number (1660116668).

Almost surely, 2^21041344532 is an apocalyptic number.

It is an amenable number.

21041344532 is a deficient number, since it is larger than the sum of its proper divisors (18801455500).

21041344532 is a wasteful number, since it uses less digits than its factorization.

21041344532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917959 (or 1917957 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 21041344532 its reverse (23544314012), we get a palindrome (44585658544).

The spelling of 21041344532 in words is "twenty-one billion, forty-one million, three hundred forty-four thousand, five hundred thirty-two".