21424433241 has 16 divisors (see below), whose sum is σ = 28897214400. Its totient is φ = 14117419008.

The previous prime is 21424433227. The next prime is 21424433249. The reversal of 21424433241 is 14233442412.

It is not a de Polignac number, because 21424433241 - 2¹⁰ = 21424432217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21424433199 and 21424433208.

It is not an unprimeable number, because it can be changed into a prime (21424433249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 824790 + ... + 850368.

It is an arithmetic number, because the mean of its divisors is an integer number (1806075900).

Almost surely, 2^21424433241 is an apocalyptic number.

It is an amenable number.

21424433241 is a deficient number, since it is larger than the sum of its proper divisors (7472781159).

21424433241 is a wasteful number, since it uses less digits than its factorization.

21424433241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28808.

The product of its digits is 18432, while the sum is 30.

Adding to 21424433241 its reverse (14233442412), we get a palindrome (35657875653).

The spelling of 21424433241 in words is "twenty-one billion, four hundred twenty-four million, four hundred thirty-three thousand, two hundred forty-one".