21260242132 has 24 divisors (see below), whose sum is σ = 38066112000. Its totient is φ = 10385889696.

The previous prime is 21260242127. The next prime is 21260242139. The reversal of 21260242132 is 23124206212.

It is a super-2 number, since 2×21260242132² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21260242097 and 21260242106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21260242139) 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, 159132 + ... + 260467.

It is an arithmetic number, because the mean of its divisors is an integer number (1586088000).

Almost surely, 2^21260242132 is an apocalyptic number.

It is an amenable number.

21260242132 is a deficient number, since it is larger than the sum of its proper divisors (16805869868).

21260242132 is a wasteful number, since it uses less digits than its factorization.

21260242132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419895 (or 419893 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21260242132 its reverse (23124206212), we get a palindrome (44384448344).

The spelling of 21260242132 in words is "twenty-one billion, two hundred sixty million, two hundred forty-two thousand, one hundred thirty-two".