21613432306233 has 8 divisors (see below), whose sum is σ = 28817985583296. Its totient is φ = 14408916950000.

The previous prime is 21613432306199. The next prime is 21613432306241. The reversal of 21613432306233 is 33260323431612.

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 21613432306233 - 2¹⁰ = 21613432305209 is a prime.

It is a super-2 number, since 2×21613432306233² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21613432306191 and 21613432306200.

It is not an unprimeable number, because it can be changed into a prime (21613432306243) 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, 8122518 + ... + 10449983.

It is an arithmetic number, because the mean of its divisors is an integer number (3602248197912).

Almost surely, 2^{21613432306233} is an apocalyptic number.

It is an amenable number.

21613432306233 is a deficient number, since it is larger than the sum of its proper divisors (7204553277063).

21613432306233 is a wasteful number, since it uses less digits than its factorization.

21613432306233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18960415.

The product of its (nonzero) digits is 279936, while the sum is 39.

Adding to 21613432306233 its reverse (33260323431612), we get a palindrome (54873755737845).

The spelling of 21613432306233 in words is "twenty-one trillion, six hundred thirteen billion, four hundred thirty-two million, three hundred six thousand, two hundred thirty-three".