21400314 has 32 divisors (see below), whose sum is σ = 48807360. Its totient is φ = 6196992.

The previous prime is 21400277. The next prime is 21400343. The reversal of 21400314 is 41300412.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21400293 and 21400302.

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 15 ways as a sum of consecutive naturals, for example, 6744 + ... + 9395.

It is an arithmetic number, because the mean of its divisors is an integer number (1525230).

Almost surely, 2^21400314 is an apocalyptic number.

21400314 is an abundant number, since it is smaller than the sum of its proper divisors (27407046).

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

21400314 is a wasteful number, since it uses less digits than its factorization.

21400314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16174.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 21400314 is about 4626.0473408732. The cubic root of 21400314 is about 277.6344677419.

Adding to 21400314 its reverse (41300412), we get a palindrome (62700726).

The spelling of 21400314 in words is "twenty-one million, four hundred thousand, three hundred fourteen".