21857800275603 has 12 divisors (see below), whose sum is σ = 32043607701768. Its totient is φ = 14354376300000.

The previous prime is 21857800275593. The next prime is 21857800275611. The reversal of 21857800275603 is 30657200875812.

21857800275603 is a `hidden beast` number, since 2 + 1 + 8 + 5 + 7 + 8 + 0 + 0 + 27 + 5 + 603 = 666.

It is not a de Polignac number, because 21857800275603 - 2²⁸ = 21857531840147 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21857800275603.

It is not an unprimeable number, because it can be changed into a prime (21857800265603) 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 11 ways as a sum of consecutive naturals, for example, 18124211898 + ... + 18124213103.

It is an arithmetic number, because the mean of its divisors is an integer number (2670300641814).

Almost surely, 2^{21857800275603} is an apocalyptic number.

21857800275603 is a deficient number, since it is larger than the sum of its proper divisors (10185807426165).

21857800275603 is a wasteful number, since it uses less digits than its factorization.

21857800275603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36248425074 (or 36248425071 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 54.

The spelling of 21857800275603 in words is "twenty-one trillion, eight hundred fifty-seven billion, eight hundred million, two hundred seventy-five thousand, six hundred three".