21413395 has 8 divisors (see below), whose sum is σ = 25826400. Its totient is φ = 17043840.

The previous prime is 21413393. The next prime is 21413423. The reversal of 21413395 is 59331412.

21413395 = 3² + 4² + ... + 400².

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

It is not a de Polignac number, because 21413395 - 2¹ = 21413393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21413393) 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 in 7 ways as a sum of consecutive naturals, for example, 9766 + ... + 11755.

It is an arithmetic number, because the mean of its divisors is an integer number (3228300).

Almost surely, 2^21413395 is an apocalyptic number.

21413395 is a deficient number, since it is larger than the sum of its proper divisors (4413005).

21413395 is a wasteful number, since it uses less digits than its factorization.

21413395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21725.

The product of its digits is 3240, while the sum is 28.

The square root of 21413395 is about 4627.4609668802. The cubic root of 21413395 is about 277.6910244939.

The spelling of 21413395 in words is "twenty-one million, four hundred thirteen thousand, three hundred ninety-five".