21489828168311 has 4 divisors (see below), whose sum is σ = 21489846804624. Its totient is φ = 21489809532000.

The previous prime is 21489828168271. The next prime is 21489828168313. The reversal of 21489828168311 is 11386182898412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21489828168311 - 2³⁰ = 21488754426487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21489828168313) 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, 7465730 + ... + 9935631.

It is an arithmetic number, because the mean of its divisors is an integer number (5372461701156).

Almost surely, 2^{21489828168311} is an apocalyptic number.

21489828168311 is a deficient number, since it is larger than the sum of its proper divisors (18636313).

21489828168311 is a wasteful number, since it uses less digits than its factorization.

21489828168311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18636312.

The product of its digits is 10616832, while the sum is 62.

The spelling of 21489828168311 in words is "twenty-one trillion, four hundred eighty-nine billion, eight hundred twenty-eight million, one hundred sixty-eight thousand, three hundred eleven".