21299411 has 8 divisors (see below), whose sum is σ = 24417120. Its totient is φ = 18200448.

The previous prime is 21299407. The next prime is 21299417. The reversal of 21299411 is 11499212.

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

It is not a de Polignac number, because 21299411 - 2² = 21299407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21299417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2156 + ... + 6873.

It is an arithmetic number, because the mean of its divisors is an integer number (3052140).

Almost surely, 2^21299411 is an apocalyptic number.

21299411 is a deficient number, since it is larger than the sum of its proper divisors (3117709).

21299411 is an equidigital number, since it uses as much as digits as its factorization.

21299411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9373.

The product of its digits is 1296, while the sum is 29.

The square root of 21299411 is about 4615.1284922524. The cubic root of 21299411 is about 277.1974290529.

The spelling of 21299411 in words is "twenty-one million, two hundred ninety-nine thousand, four hundred eleven".