21424024411 has 8 divisors (see below), whose sum is σ = 21635261024. Its totient is φ = 21212850240.

The previous prime is 21424024403. The next prime is 21424024417. The reversal of 21424024411 is 11442042412.

It is a happy number.

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 21424024411 - 2³ = 21424024403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21424024417) 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, 990565 + ... + 1011961.

It is an arithmetic number, because the mean of its divisors is an integer number (2704407628).

Almost surely, 2^21424024411 is an apocalyptic number.

21424024411 is a deficient number, since it is larger than the sum of its proper divisors (211236613).

21424024411 is a wasteful number, since it uses less digits than its factorization.

21424024411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31221.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 21424024411 its reverse (11442042412), we get a palindrome (32866066823).

The spelling of 21424024411 in words is "twenty-one billion, four hundred twenty-four million, twenty-four thousand, four hundred eleven".