21849285163 has 4 divisors (see below), whose sum is σ = 22999247560. Its totient is φ = 20699322768.

The previous prime is 21849285149. The next prime is 21849285167. The reversal of 21849285163 is 36158294812.

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 21849285163 - 2¹³ = 21849276971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21849285167) 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, 574981170 + ... + 574981207.

It is an arithmetic number, because the mean of its divisors is an integer number (5749811890).

Almost surely, 2^21849285163 is an apocalyptic number.

21849285163 is a deficient number, since it is larger than the sum of its proper divisors (1149962397).

21849285163 is a wasteful number, since it uses less digits than its factorization.

21849285163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149962396.

The product of its digits is 829440, while the sum is 49.

The spelling of 21849285163 in words is "twenty-one billion, eight hundred forty-nine million, two hundred eighty-five thousand, one hundred sixty-three".