21296413 has 8 divisors (see below), whose sum is σ = 22268736. Its totient is φ = 20328000.

The previous prime is 21296399. The next prime is 21296417. The reversal of 21296413 is 31469212.

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

It is a cyclic number.

It is not a de Polignac number, because 21296413 - 2¹³ = 21288221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21296417) 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, 19738 + ... + 20788.

It is an arithmetic number, because the mean of its divisors is an integer number (2783592).

Almost surely, 2^21296413 is an apocalyptic number.

21296413 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21296413 is a deficient number, since it is larger than the sum of its proper divisors (972323).

21296413 is a wasteful number, since it uses less digits than its factorization.

21296413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955.

The product of its digits is 2592, while the sum is 28.

The square root of 21296413 is about 4614.8036794646. The cubic root of 21296413 is about 277.1844227952.

The spelling of 21296413 in words is "twenty-one million, two hundred ninety-six thousand, four hundred thirteen".