21045452311 has 8 divisors (see below), whose sum is σ = 23997529584. Its totient is φ = 18283831680.

The previous prime is 21045452303. The next prime is 21045452327. The reversal of 21045452311 is 11325454012.

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 21045452311 - 2³ = 21045452303 is a prime.

It is a super-2 number, since 2×21045452311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21045452311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21045452381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47613925 + ... + 47614366.

It is an arithmetic number, because the mean of its divisors is an integer number (2999691198).

Almost surely, 2^21045452311 is an apocalyptic number.

21045452311 is a deficient number, since it is larger than the sum of its proper divisors (2952077273).

21045452311 is a wasteful number, since it uses less digits than its factorization.

21045452311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95228321.

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 21045452311 in words is "twenty-one billion, forty-five million, four hundred fifty-two thousand, three hundred eleven".