21796413 has 8 divisors (see below), whose sum is σ = 29460288. Its totient is φ = 14331744.

The previous prime is 21796393. The next prime is 21796417. The reversal of 21796413 is 31469712.

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

It is not a de Polignac number, because 21796413 - 2¹⁷ = 21665341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21796417) 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, 49545 + ... + 49982.

It is an arithmetic number, because the mean of its divisors is an integer number (3682536).

Almost surely, 2^21796413 is an apocalyptic number.

It is an amenable number.

21796413 is a deficient number, since it is larger than the sum of its proper divisors (7663875).

21796413 is an equidigital number, since it uses as much as digits as its factorization.

21796413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99603.

The product of its digits is 9072, while the sum is 33.

The square root of 21796413 is about 4668.6628706729. The cubic root of 21796413 is about 279.3369216253.

The spelling of 21796413 in words is "twenty-one million, seven hundred ninety-six thousand, four hundred thirteen".