21336214 has 16 divisors (see below), whose sum is σ = 33230016. Its totient is φ = 10269960.

The previous prime is 21336197. The next prime is 21336223. The reversal of 21336214 is 41263312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349744 + ... + 349804.

It is an arithmetic number, because the mean of its divisors is an integer number (2076876).

Almost surely, 2^21336214 is an apocalyptic number.

21336214 is a deficient number, since it is larger than the sum of its proper divisors (11893802).

21336214 is an frugal number, since it uses more digits than its factorization.

21336214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 110 counting only the distinct ones).

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

The square root of 21336214 is about 4619.1139843048. The cubic root of 21336214 is about 277.3569925704.

Adding to 21336214 its reverse (41263312), we get a palindrome (62599526).

The spelling of 21336214 in words is "twenty-one million, three hundred thirty-six thousand, two hundred fourteen".