21361152 has 40 divisors (see below), whose sum is σ = 56911536. Its totient is φ = 7119872.

The previous prime is 21361147. The next prime is 21361169. The reversal of 21361152 is 25116312.

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, 5418 + ... + 8489.

Almost surely, 2^21361152 is an apocalyptic number.

It is an amenable number.

21361152 is an abundant number, since it is smaller than the sum of its proper divisors (35550384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21361152 is an equidigital number, since it uses as much as digits as its factorization.

21361152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13928 (or 13912 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 21361152 is about 4621.8126314250. The cubic root of 21361152 is about 277.4650097916.

Adding to 21361152 its reverse (25116312), we get a palindrome (46477464).

The spelling of 21361152 in words is "twenty-one million, three hundred sixty-one thousand, one hundred fifty-two".