21352314 has 32 divisors (see below), whose sum is σ = 45276480. Its totient is φ = 6694272.

The previous prime is 21352291. The next prime is 21352343. The reversal of 21352314 is 41325312.

It is a super-4 number, since 4×21352314⁴ (a number of 30 digits) contains 4444 as substring.

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, 17302 + ... + 18494.

It is an arithmetic number, because the mean of its divisors is an integer number (1414890).

Almost surely, 2^21352314 is an apocalyptic number.

21352314 is an abundant number, since it is smaller than the sum of its proper divisors (23924166).

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

21352314 is a wasteful number, since it uses less digits than its factorization.

21352314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374.

The product of its digits is 720, while the sum is 21.

The square root of 21352314 is about 4620.8564141293. The cubic root of 21352314 is about 277.4267382285.

Adding to 21352314 its reverse (41325312), we get a palindrome (62677626).

The spelling of 21352314 in words is "twenty-one million, three hundred fifty-two thousand, three hundred fourteen".