21153203067 has 16 divisors (see below), whose sum is σ = 29513095200. Its totient is φ = 13462106112.

The previous prime is 21153203051. The next prime is 21153203087. The reversal of 21153203067 is 76030235112.

It is not a de Polignac number, because 21153203067 - 2⁴ = 21153203051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21153203087) 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, 1791942 + ... + 1803707.

It is an arithmetic number, because the mean of its divisors is an integer number (1844568450).

Almost surely, 2^21153203067 is an apocalyptic number.

21153203067 is a deficient number, since it is larger than the sum of its proper divisors (8359892133).

21153203067 is a wasteful number, since it uses less digits than its factorization.

21153203067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3595742.

The product of its (nonzero) digits is 7560, while the sum is 30.

Adding to 21153203067 its reverse (76030235112), we get a palindrome (97183438179).

The spelling of 21153203067 in words is "twenty-one billion, one hundred fifty-three million, two hundred three thousand, sixty-seven".