21361342 has 32 divisors (see below), whose sum is σ = 35251200. Its totient is φ = 9676128.

The previous prime is 21361303. The next prime is 21361391. The reversal of 21361342 is 24316312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89259 + ... + 89497.

It is an arithmetic number, because the mean of its divisors is an integer number (1101600).

Almost surely, 2^21361342 is an apocalyptic number.

21361342 is a deficient number, since it is larger than the sum of its proper divisors (13889858).

21361342 is a wasteful number, since it uses less digits than its factorization.

21361342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360.

The product of its digits is 864, while the sum is 22.

The square root of 21361342 is about 4621.8331860854. The cubic root of 21361342 is about 277.4658324407.

Adding to 21361342 its reverse (24316312), we get a palindrome (45677654).

The spelling of 21361342 in words is "twenty-one million, three hundred sixty-one thousand, three hundred forty-two".