21452776885 has 8 divisors (see below), whose sum is σ = 25745728896. Its totient is φ = 17160623760.

The previous prime is 21452776871. The next prime is 21452776889. The reversal of 21452776885 is 58867725412.

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

It is a de Polignac number, because none of the positive numbers 2^k-21452776885 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 (21452776889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138961 + ... + 249430.

It is an arithmetic number, because the mean of its divisors is an integer number (3218216112).

Almost surely, 2^21452776885 is an apocalyptic number.

It is an amenable number.

21452776885 is a deficient number, since it is larger than the sum of its proper divisors (4292952011).

21452776885 is a wasteful number, since it uses less digits than its factorization.

21452776885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399443.

The product of its digits is 7526400, while the sum is 55.

The spelling of 21452776885 in words is "twenty-one billion, four hundred fifty-two million, seven hundred seventy-six thousand, eight hundred eighty-five".