21612014 has 8 divisors (see below), whose sum is σ = 32442120. Its totient is φ = 10797976.

The previous prime is 21612013. The next prime is 21612023. The reversal of 21612014 is 41021612.

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

It is a super-3 number, since 3×21612014³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21611983 and 21612001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21612011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257 + ... + 6579.

It is an arithmetic number, because the mean of its divisors is an integer number (4055265).

Almost surely, 2^21612014 is an apocalyptic number.

21612014 is a deficient number, since it is larger than the sum of its proper divisors (10830106).

21612014 is a wasteful number, since it uses less digits than its factorization.

21612014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8034.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 21612014 is about 4648.8723363844. The cubic root of 21612014 is about 278.5469538248.

Adding to 21612014 its reverse (41021612), we get a palindrome (62633626).

The spelling of 21612014 in words is "twenty-one million, six hundred twelve thousand, fourteen".