21255422023 has 32 divisors (see below), whose sum is σ = 24299092800. Its totient is φ = 18415488000.

The previous prime is 21255422021. The next prime is 21255422029. The reversal of 21255422023 is 32022455212.

It is a cyclic number.

It is not a de Polignac number, because 21255422023 - 2¹ = 21255422021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21255421982 and 21255422000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21255422021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13176765 + ... + 13178377.

It is an arithmetic number, because the mean of its divisors is an integer number (759346650).

Almost surely, 2^21255422023 is an apocalyptic number.

21255422023 is a deficient number, since it is larger than the sum of its proper divisors (3043670777).

21255422023 is a wasteful number, since it uses less digits than its factorization.

21255422023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 21255422023 its reverse (32022455212), we get a palindrome (53277877235).

The spelling of 21255422023 in words is "twenty-one billion, two hundred fifty-five million, four hundred twenty-two thousand, twenty-three".