21310014 has 32 divisors (see below), whose sum is σ = 47142144. Its totient is φ = 6367680.

The previous prime is 21310007. The next prime is 21310021. The reversal of 21310014 is 41001312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21310007) and next prime (21310021).

It is a congruent number.

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, 2607 + ... + 7029.

It is an arithmetic number, because the mean of its divisors is an integer number (1473192).

Almost surely, 2^21310014 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21310014, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23571072).

21310014 is an abundant number, since it is smaller than the sum of its proper divisors (25832130).

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

21310014 is a wasteful number, since it uses less digits than its factorization.

21310014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4512.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 21310014 is about 4616.2770714072. The cubic root of 21310014 is about 277.2434183805.

Adding to 21310014 its reverse (41001312), we get a palindrome (62311326).

The spelling of 21310014 in words is "twenty-one million, three hundred ten thousand, fourteen".