21552106653 has 96 divisors (see below), whose sum is σ = 40154849280. Its totient is φ = 10813150080.

The previous prime is 21552106571. The next prime is 21552106679. The reversal of 21552106653 is 35660125512.

21552106653 is a `hidden beast` number, since 21 + 5 + 521 + 0 + 66 + 53 = 666.

It is not a de Polignac number, because 21552106653 - 2⁹ = 21552106141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21552102653) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3561076 + ... + 3567122.

It is an arithmetic number, because the mean of its divisors is an integer number (418279680).

Almost surely, 2^21552106653 is an apocalyptic number.

It is an amenable number.

21552106653 is a deficient number, since it is larger than the sum of its proper divisors (18602742627).

21552106653 is a wasteful number, since it uses less digits than its factorization.

21552106653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6247 (or 6244 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 21552106653 in words is "twenty-one billion, five hundred fifty-two million, one hundred six thousand, six hundred fifty-three".