21260732 has 12 divisors (see below), whose sum is σ = 37998240. Its totient is φ = 10404096.

The previous prime is 21260711. The next prime is 21260749. The reversal of 21260732 is 23706212.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 21260698 and 21260707.

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, 56357 + ... + 56732.

It is an arithmetic number, because the mean of its divisors is an integer number (3166520).

Almost surely, 2^21260732 is an apocalyptic number.

It is an amenable number.

21260732 is a deficient number, since it is larger than the sum of its proper divisors (16737508).

21260732 is a wasteful number, since it uses less digits than its factorization.

21260732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113140 (or 113138 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 21260732 is about 4610.9361305488. The cubic root of 21260732 is about 277.0295337058.

Adding to 21260732 its reverse (23706212), we get a palindrome (44966944).

The spelling of 21260732 in words is "twenty-one million, two hundred sixty thousand, seven hundred thirty-two".