21541042653 has 16 divisors (see below), whose sum is σ = 32558662080. Its totient is φ = 12558340224.

The previous prime is 21541042639. The next prime is 21541042661. The reversal of 21541042653 is 35624014512.

It is not a de Polignac number, because 21541042653 - 2⁹ = 21541042141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21541042673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14534376 + ... + 14535857.

It is an arithmetic number, because the mean of its divisors is an integer number (2034916380).

Almost surely, 2^21541042653 is an apocalyptic number.

It is an amenable number.

21541042653 is a deficient number, since it is larger than the sum of its proper divisors (11017619427).

21541042653 is a wasteful number, since it uses less digits than its factorization.

21541042653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29070268.

The product of its (nonzero) digits is 28800, while the sum is 33.

The spelling of 21541042653 in words is "twenty-one billion, five hundred forty-one million, forty-two thousand, six hundred fifty-three".