21361348 has 12 divisors (see below), whose sum is σ = 37599660. Its totient is φ = 10618592.

The previous prime is 21361303. The next prime is 21361391. The reversal of 21361348 is 84316312.

It can be written as a sum of positive squares in 2 ways, for example, as 9746884 + 11614464 = 3122^2 + 3408^2 .

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, 14743 + ... + 16126.

It is an arithmetic number, because the mean of its divisors is an integer number (3133305).

Almost surely, 2^21361348 is an apocalyptic number.

It is an amenable number.

21361348 is a deficient number, since it is larger than the sum of its proper divisors (16238312).

21361348 is a wasteful number, since it uses less digits than its factorization.

21361348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31046 (or 31044 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 21361348 is about 4621.8338351784. The cubic root of 21361348 is about 277.4658584190.

The spelling of 21361348 in words is "twenty-one million, three hundred sixty-one thousand, three hundred forty-eight".