21155532116326 has 8 divisors (see below), whose sum is σ = 33403471762680. Its totient is φ = 10021041528768.

The previous prime is 21155532116321. The next prime is 21155532116351. The reversal of 21155532116326 is 62361123555112.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21155532116321) 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, 278362264651 + ... + 278362264726.

It is an arithmetic number, because the mean of its divisors is an integer number (4175433970335).

Almost surely, 2^{21155532116326} is an apocalyptic number.

21155532116326 is a deficient number, since it is larger than the sum of its proper divisors (12247939646354).

21155532116326 is a wasteful number, since it uses less digits than its factorization.

21155532116326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556724529398.

The product of its digits is 324000, while the sum is 43.

The spelling of 21155532116326 in words is "twenty-one trillion, one hundred fifty-five billion, five hundred thirty-two million, one hundred sixteen thousand, three hundred twenty-six".