21361334 has 4 divisors (see below), whose sum is σ = 32042004. Its totient is φ = 10680666.

The previous prime is 21361303. The next prime is 21361391. The reversal of 21361334 is 43316312.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5340332 + ... + 5340335.

It is an arithmetic number, because the mean of its divisors is an integer number (8010501).

Almost surely, 2^21361334 is an apocalyptic number.

21361334 is a deficient number, since it is larger than the sum of its proper divisors (10680670).

21361334 is a wasteful number, since it uses less digits than its factorization.

21361334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10680669.

The product of its digits is 1296, while the sum is 23.

The square root of 21361334 is about 4621.8323206278. The cubic root of 21361334 is about 277.4657978029.

Adding to 21361334 its reverse (43316312), we get a palindrome (64677646).

The spelling of 21361334 in words is "twenty-one million, three hundred sixty-one thousand, three hundred thirty-four".