20220999966 has 24 divisors (see below), whose sum is σ = 43818076224. Its totient is φ = 6739424160.

The previous prime is 20220999937. The next prime is 20220999973. The reversal of 20220999966 is 66999902202.

It is a congruent number.

It is an unprimeable number.

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, 68851 + ... + 212561.

It is an arithmetic number, because the mean of its divisors is an integer number (1825753176).

Almost surely, 2^20220999966 is an apocalyptic number.

20220999966 is an abundant number, since it is smaller than the sum of its proper divisors (23597076258).

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

20220999966 is a wasteful number, since it uses less digits than its factorization.

20220999966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151536 (or 151533 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 54.

The spelling of 20220999966 in words is "twenty billion, two hundred twenty million, nine hundred ninety-nine thousand, nine hundred sixty-six".