21153013304163 has 8 divisors (see below), whose sum is σ = 30373557565008. Its totient is φ = 13017238956384.

The previous prime is 21153013304147. The next prime is 21153013304173. The reversal of 21153013304163 is 36140331035112.

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

It is not a de Polignac number, because 21153013304163 - 2⁴ = 21153013304147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21153013304173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271192478220 + ... + 271192478297.

It is an arithmetic number, because the mean of its divisors is an integer number (3796694695626).

Almost surely, 2^{21153013304163} is an apocalyptic number.

21153013304163 is a deficient number, since it is larger than the sum of its proper divisors (9220544260845).

21153013304163 is a wasteful number, since it uses less digits than its factorization.

21153013304163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542384956533.

The product of its (nonzero) digits is 19440, while the sum is 33.

Adding to 21153013304163 its reverse (36140331035112), we get a palindrome (57293344339275).

The spelling of 21153013304163 in words is "twenty-one trillion, one hundred fifty-three billion, thirteen million, three hundred four thousand, one hundred sixty-three".