20210199980 has 12 divisors (see below), whose sum is σ = 42441420000. Its totient is φ = 8084079984.

The previous prime is 20210199979. The next prime is 20210199983. The reversal of 20210199980 is 8999101202.

It is not an unprimeable number, because it can be changed into a prime (20210199983) 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 3 ways as a sum of consecutive naturals, for example, 505254980 + ... + 505255019.

It is an arithmetic number, because the mean of its divisors is an integer number (3536785000).

Almost surely, 2^20210199980 is an apocalyptic number.

20210199980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20210199980 is an abundant number, since it is smaller than the sum of its proper divisors (22231220020).

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

20210199980 is a wasteful number, since it uses less digits than its factorization.

20210199980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010510008 (or 1010510006 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 41.

The spelling of 20210199980 in words is "twenty billion, two hundred ten million, one hundred ninety-nine thousand, nine hundred eighty".