21495214 has 16 divisors (see below), whose sum is σ = 35844480. Its totient is φ = 9600480.

The previous prime is 21495197. The next prime is 21495217. The reversal of 21495214 is 41259412.

21495214 = T₁₈₁₂ + T₁₈₁₃ + ... + T₁₈₂₄.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21495217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12529 + ... + 14140.

It is an arithmetic number, because the mean of its divisors is an integer number (2240280).

Almost surely, 2^21495214 is an apocalyptic number.

21495214 is a deficient number, since it is larger than the sum of its proper divisors (14349266).

21495214 is a wasteful number, since it uses less digits than its factorization.

21495214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26715.

The product of its digits is 2880, while the sum is 28.

The square root of 21495214 is about 4636.2931313712. The cubic root of 21495214 is about 278.0442539491.

The spelling of 21495214 in words is "twenty-one million, four hundred ninety-five thousand, two hundred fourteen".