21641014 has 8 divisors (see below), whose sum is σ = 32481288. Its totient is φ = 10813920.

The previous prime is 21641003. The next prime is 21641027. The reversal of 21641014 is 41014612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21640982 and 21641000.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 4509 + ... + 7975.

It is an arithmetic number, because the mean of its divisors is an integer number (4060161).

Almost surely, 2^21641014 is an apocalyptic number.

21641014 is a deficient number, since it is larger than the sum of its proper divisors (10840274).

21641014 is a wasteful number, since it uses less digits than its factorization.

21641014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6590.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 21641014 is about 4651.9903267311. The cubic root of 21641014 is about 278.6714872020.

Adding to 21641014 its reverse (41014612), we get a palindrome (62655626).

The spelling of 21641014 in words is "twenty-one million, six hundred forty-one thousand, fourteen".