21850168867 has 8 divisors (see below), whose sum is σ = 23881779072. Its totient is φ = 19901481600.

The previous prime is 21850168849. The next prime is 21850168877. The reversal of 21850168867 is 76886105812.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21850168867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21850168817) 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, 20730184 + ... + 20731237.

It is an arithmetic number, because the mean of its divisors is an integer number (2985222384).

Almost surely, 2^21850168867 is an apocalyptic number.

21850168867 is a deficient number, since it is larger than the sum of its proper divisors (2031610205).

21850168867 is a wasteful number, since it uses less digits than its factorization.

21850168867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41461469.

The product of its (nonzero) digits is 1290240, while the sum is 52.

The spelling of 21850168867 in words is "twenty-one billion, eight hundred fifty million, one hundred sixty-eight thousand, eight hundred sixty-seven".