21164530003 has 4 divisors (see below), whose sum is σ = 21614839200. Its totient is φ = 20714220808.

The previous prime is 21164529983. The next prime is 21164530019. The reversal of 21164530003 is 30003546112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21164530003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21164530003.

It is not an unprimeable number, because it can be changed into a prime (21164530033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225154528 + ... + 225154621.

It is an arithmetic number, because the mean of its divisors is an integer number (5403709800).

Almost surely, 2^21164530003 is an apocalyptic number.

21164530003 is a deficient number, since it is larger than the sum of its proper divisors (450309197).

21164530003 is an equidigital number, since it uses as much as digits as its factorization.

21164530003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450309196.

The product of its (nonzero) digits is 2160, while the sum is 25.

The spelling of 21164530003 in words is "twenty-one billion, one hundred sixty-four million, five hundred thirty thousand, three".