21433008845 has 8 divisors (see below), whose sum is σ = 25721881080. Its totient is φ = 17144893440.

The previous prime is 21433008809. The next prime is 21433008869. The reversal of 21433008845 is 54880033412.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7029648649 + 14403360196 = 83843^2 + 120014^2 .

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

It is not a de Polignac number, because 21433008845 - 2⁸ = 21433008589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21433008799 and 21433008808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124916 + ... + 241805.

It is an arithmetic number, because the mean of its divisors is an integer number (3215235135).

Almost surely, 2^21433008845 is an apocalyptic number.

It is an amenable number.

21433008845 is a deficient number, since it is larger than the sum of its proper divisors (4288872235).

21433008845 is a wasteful number, since it uses less digits than its factorization.

21433008845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378415.

The product of its (nonzero) digits is 92160, while the sum is 38.

The spelling of 21433008845 in words is "twenty-one billion, four hundred thirty-three million, eight thousand, eight hundred forty-five".