21355314 has 16 divisors (see below), whose sum is σ = 42826752. Its totient is φ = 7099088.

The previous prime is 21355291. The next prime is 21355351. The reversal of 21355314 is 41355312.

It is a super-4 number, since 4×21355314⁴ (a number of 30 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2349 + ... + 6944.

It is an arithmetic number, because the mean of its divisors is an integer number (2676672).

Almost surely, 2^21355314 is an apocalyptic number.

21355314 is an abundant number, since it is smaller than the sum of its proper divisors (21471438).

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

21355314 is a wasteful number, since it uses less digits than its factorization.

21355314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9681.

The product of its digits is 1800, while the sum is 24.

The square root of 21355314 is about 4621.1810178784. The cubic root of 21355314 is about 277.4397304385.

The spelling of 21355314 in words is "twenty-one million, three hundred fifty-five thousand, three hundred fourteen".