21351014 has 16 divisors (see below), whose sum is σ = 34344000. Its totient is φ = 9919104.

The previous prime is 21351013. The next prime is 21351017. The reversal of 21351014 is 41015312.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21350983 and 21351001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21351013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1289 + ... + 6660.

It is an arithmetic number, because the mean of its divisors is an integer number (2146500).

Almost surely, 2^21351014 is an apocalyptic number.

21351014 is a deficient number, since it is larger than the sum of its proper divisors (12992986).

21351014 is a wasteful number, since it uses less digits than its factorization.

21351014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8047.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 21351014 is about 4620.7157454230. The cubic root of 21351014 is about 277.4211078929.

Adding to 21351014 its reverse (41015312), we get a palindrome (62366326).

The spelling of 21351014 in words is "twenty-one million, three hundred fifty-one thousand, fourteen".