21361132 has 24 divisors (see below), whose sum is σ = 40430096. Its totient is φ = 9816768.

The previous prime is 21361121. The next prime is 21361133. The reversal of 21361132 is 23116312.

It is not an unprimeable number, because it can be changed into a prime (21361133) 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, 13663 + ... + 15145.

Almost surely, 2^21361132 is an apocalyptic number.

It is an amenable number.

21361132 is a deficient number, since it is larger than the sum of its proper divisors (19068964).

21361132 is a wasteful number, since it uses less digits than its factorization.

21361132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777 (or 1775 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 21361132 is about 4621.8104677713. The cubic root of 21361132 is about 277.4649231967.

Adding to 21361132 its reverse (23116312), we get a palindrome (44477444).

The spelling of 21361132 in words is "twenty-one million, three hundred sixty-one thousand, one hundred thirty-two".