21272414 has 4 divisors (see below), whose sum is σ = 31908624. Its totient is φ = 10636206.

The previous prime is 21272411. The next prime is 21272429. The reversal of 21272414 is 41427212.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21272414.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21272411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5318102 + ... + 5318105.

It is an arithmetic number, because the mean of its divisors is an integer number (7977156).

Almost surely, 2^21272414 is an apocalyptic number.

21272414 is a deficient number, since it is larger than the sum of its proper divisors (10636210).

21272414 is a wasteful number, since it uses less digits than its factorization.

21272414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10636209.

The product of its digits is 896, while the sum is 23.

The square root of 21272414 is about 4612.2027275479. The cubic root of 21272414 is about 277.0802636377.

Adding to 21272414 its reverse (41427212), we get a palindrome (62699626).

The spelling of 21272414 in words is "twenty-one million, two hundred seventy-two thousand, four hundred fourteen".