21272014 has 32 divisors (see below), whose sum is σ = 34467840. Its totient is φ = 9828000.

The previous prime is 21272011. The next prime is 21272021. The reversal of 21272014 is 41027212.

21272014 = 408² + 409² + ... + 508².

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21271982 and 21272000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21272011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210564 + ... + 210664.

It is an arithmetic number, because the mean of its divisors is an integer number (1077120).

Almost surely, 2^21272014 is an apocalyptic number.

21272014 is a deficient number, since it is larger than the sum of its proper divisors (13195826).

21272014 is a wasteful number, since it uses less digits than its factorization.

21272014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 21272014 is about 4612.1593641157. The cubic root of 21272014 is about 277.0785269158.

Adding to 21272014 its reverse (41027212), we get a palindrome (62299226).

The spelling of 21272014 in words is "twenty-one million, two hundred seventy-two thousand, fourteen".