21530401240235 has 8 divisors (see below), whose sum is σ = 25839362184480. Its totient is φ = 17222400528064.

The previous prime is 21530401240163. The next prime is 21530401240289. The reversal of 21530401240235 is 53204210403512.

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 21530401240235 - 2¹² = 21530401236139 is a prime.

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, 240008687 + ... + 240098376.

It is an arithmetic number, because the mean of its divisors is an integer number (3229920273060).

Almost surely, 2^{21530401240235} is an apocalyptic number.

21530401240235 is a deficient number, since it is larger than the sum of its proper divisors (4308960944245).

21530401240235 is an equidigital number, since it uses as much as digits as its factorization.

21530401240235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480116037.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 21530401240235 its reverse (53204210403512), we get a palindrome (74734611643747).

The spelling of 21530401240235 in words is "twenty-one trillion, five hundred thirty billion, four hundred one million, two hundred forty thousand, two hundred thirty-five".