21133650163 has 4 divisors (see below), whose sum is σ = 22245947560. Its totient is φ = 20021352768.

The previous prime is 21133650151. The next prime is 21133650169. The reversal of 21133650163 is 36105633112.

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

It is a cyclic number.

It is not a de Polignac number, because 21133650163 - 2²¹ = 21131553011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21133650169) 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, 556148670 + ... + 556148707.

It is an arithmetic number, because the mean of its divisors is an integer number (5561486890).

Almost surely, 2^21133650163 is an apocalyptic number.

21133650163 is a deficient number, since it is larger than the sum of its proper divisors (1112297397).

21133650163 is a wasteful number, since it uses less digits than its factorization.

21133650163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112297396.

The product of its (nonzero) digits is 9720, while the sum is 31.

The spelling of 21133650163 in words is "twenty-one billion, one hundred thirty-three million, six hundred fifty thousand, one hundred sixty-three".