21532430221433 has 8 divisors (see below), whose sum is σ = 22058318625000. Its totient is φ = 21006575493120.

The previous prime is 21532430221411. The next prime is 21532430221441. The reversal of 21532430221433 is 33412203423512.

It can be written as a sum of positive squares in 4 ways, for example, as 223986385984 + 21308443835449 = 473272^2 + 4616107^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21532430221433 - 2³² = 21528135254137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21532430221393 and 21532430221402.

It is not an unprimeable number, because it can be changed into a prime (21532430271433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7121960 + ... + 9684377.

It is an arithmetic number, because the mean of its divisors is an integer number (2757289828125).

Almost surely, 2^{21532430221433} is an apocalyptic number.

It is an amenable number.

21532430221433 is a deficient number, since it is larger than the sum of its proper divisors (525888403567).

21532430221433 is a wasteful number, since it uses less digits than its factorization.

21532430221433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16837627.

The product of its (nonzero) digits is 103680, while the sum is 35.

Adding to 21532430221433 its reverse (33412203423512), we get a palindrome (54944633644945).

The spelling of 21532430221433 in words is "twenty-one trillion, five hundred thirty-two billion, four hundred thirty million, two hundred twenty-one thousand, four hundred thirty-three".