21424445120433 has 16 divisors (see below), whose sum is σ = 29413397931840. Its totient is φ = 13861212572736.

The previous prime is 21424445120399. The next prime is 21424445120557. The reversal of 21424445120433 is 33402154442412.

It is not a de Polignac number, because 21424445120433 - 2⁹ = 21424445119921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21424445120391 and 21424445120400.

It is not an unprimeable number, because it can be changed into a prime (21424445120333) 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, 248045535 + ... + 248131892.

It is an arithmetic number, because the mean of its divisors is an integer number (1838337370740).

Almost surely, 2^{21424445120433} is an apocalyptic number.

It is an amenable number.

21424445120433 is a deficient number, since it is larger than the sum of its proper divisors (7988952811407).

21424445120433 is a wasteful number, since it uses less digits than its factorization.

21424445120433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496177856.

The product of its (nonzero) digits is 368640, while the sum is 39.

Adding to 21424445120433 its reverse (33402154442412), we get a palindrome (54826599562845).

The spelling of 21424445120433 in words is "twenty-one trillion, four hundred twenty-four billion, four hundred forty-five million, one hundred twenty thousand, four hundred thirty-three".