21344274 has 24 divisors (see below), whose sum is σ = 52852800. Its totient is φ = 6098328.

The previous prime is 21344273. The next prime is 21344311. The reversal of 21344274 is 47244312.

21344274 is a `hidden beast` number, since 213 + 442 + 7 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (21344273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84574 + ... + 84825.

It is an arithmetic number, because the mean of its divisors is an integer number (2202200).

Almost surely, 2^21344274 is an apocalyptic number.

21344274 is an abundant number, since it is smaller than the sum of its proper divisors (31508526).

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

21344274 is a wasteful number, since it uses less digits than its factorization.

21344274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169414 (or 169411 counting only the distinct ones).

The product of its digits is 5376, while the sum is 27.

The square root of 21344274 is about 4619.9863636162. The cubic root of 21344274 is about 277.3919131038.

Adding to 21344274 its reverse (47244312), we get a palindrome (68588586).

The spelling of 21344274 in words is "twenty-one million, three hundred forty-four thousand, two hundred seventy-four".