21230032624433 has 4 divisors (see below), whose sum is σ = 21297004336500. Its totient is φ = 21163060912368.

The previous prime is 21230032624397. The next prime is 21230032624501. The reversal of 21230032624433 is 33442623003212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8384632558129 + 12845400066304 = 2895623^2 + 3584048^2 .

It is a cyclic number.

It is not a de Polignac number, because 21230032624433 - 2⁶ = 21230032624369 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21230032624393 and 21230032624402.

It is not an unprimeable number, because it can be changed into a prime (21230032621433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33485855558 + ... + 33485856191.

It is an arithmetic number, because the mean of its divisors is an integer number (5324251084125).

Almost surely, 2^{21230032624433} is an apocalyptic number.

It is an amenable number.

21230032624433 is a deficient number, since it is larger than the sum of its proper divisors (66971712067).

21230032624433 is an equidigital number, since it uses as much as digits as its factorization.

21230032624433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66971712066.

The product of its (nonzero) digits is 124416, while the sum is 35.

Adding to 21230032624433 its reverse (33442623003212), we get a palindrome (54672655627645).

The spelling of 21230032624433 in words is "twenty-one trillion, two hundred thirty billion, thirty-two million, six hundred twenty-four thousand, four hundred thirty-three".