21250014 has 8 divisors (see below), whose sum is σ = 42500040. Its totient is φ = 7083336.

The previous prime is 21250007. The next prime is 21250039. The reversal of 21250014 is 41005212.

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

21250014 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21249975 and 21250002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1770829 + ... + 1770840.

It is an arithmetic number, because the mean of its divisors is an integer number (5312505).

Almost surely, 2^21250014 is an apocalyptic number.

21250014 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21250014 is a wasteful number, since it uses less digits than its factorization.

21250014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3541674.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 21250014 is about 4609.7737471594. The cubic root of 21250014 is about 276.9829736653.

Adding to 21250014 its reverse (41005212), we get a palindrome (62255226).

The spelling of 21250014 in words is "twenty-one million, two hundred fifty thousand, fourteen".