20021169850 has 24 divisors (see below), whose sum is σ = 40624774848. Its totient is φ = 7280425200.

The previous prime is 20021169803. The next prime is 20021169851. The reversal of 20021169850 is 5896112002.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20021169851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18200514 + ... + 18201613.

It is an arithmetic number, because the mean of its divisors is an integer number (1692698952).

Almost surely, 2^20021169850 is an apocalyptic number.

20021169850 is an abundant number, since it is smaller than the sum of its proper divisors (20603604998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20021169850 is a wasteful number, since it uses less digits than its factorization.

20021169850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36402150 (or 36402145 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The spelling of 20021169850 in words is "twenty billion, twenty-one million, one hundred sixty-nine thousand, eight hundred fifty".