21324420411 has 8 divisors (see below), whose sum is σ = 32494354944. Its totient is φ = 12185383080.

The previous prime is 21324420329. The next prime is 21324420413. The reversal of 21324420411 is 11402442312.

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

It is not a de Polignac number, because 21324420411 - 2⁷ = 21324420283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21324420413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507724275 + ... + 507724316.

It is an arithmetic number, because the mean of its divisors is an integer number (4061794368).

Almost surely, 2^21324420411 is an apocalyptic number.

21324420411 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21324420411 is a deficient number, since it is larger than the sum of its proper divisors (11169934533).

21324420411 is a wasteful number, since it uses less digits than its factorization.

21324420411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015448601.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21324420411 its reverse (11402442312), we get a palindrome (32726862723).

The spelling of 21324420411 in words is "twenty-one billion, three hundred twenty-four million, four hundred twenty thousand, four hundred eleven".