21400514 has 4 divisors (see below), whose sum is σ = 32100774. Its totient is φ = 10700256.

The previous prime is 21400507. The next prime is 21400523. The reversal of 21400514 is 41500412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19509889 + 1890625 = 4417^2 + 1375^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21400492 and 21400501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5350127 + ... + 5350130.

Almost surely, 2^21400514 is an apocalyptic number.

21400514 is a deficient number, since it is larger than the sum of its proper divisors (10700260).

21400514 is a wasteful number, since it uses less digits than its factorization.

21400514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10700259.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 21400514 is about 4626.0689575492. The cubic root of 21400514 is about 277.6353326314.

Adding to 21400514 its reverse (41500412), we get a palindrome (62900926).

The spelling of 21400514 in words is "twenty-one million, four hundred thousand, five hundred fourteen".