21535241242326 has 32 divisors (see below), whose sum is σ = 49223546304768. Its totient is φ = 6152908850400.

The previous prime is 21535241242309. The next prime is 21535241242337. The reversal of 21535241242326 is 62324214253512.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27876676 + ... + 28638776.

It is an arithmetic number, because the mean of its divisors is an integer number (1538235822024).

Almost surely, 2^{21535241242326} is an apocalyptic number.

21535241242326 is an abundant number, since it is smaller than the sum of its proper divisors (27688305062442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21535241242326 is a wasteful number, since it uses less digits than its factorization.

21535241242326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434916.

The product of its digits is 691200, while the sum is 42.

Adding to 21535241242326 its reverse (62324214253512), we get a palindrome (83859455495838).

The spelling of 21535241242326 in words is "twenty-one trillion, five hundred thirty-five billion, two hundred forty-one million, two hundred forty-two thousand, three hundred twenty-six".