20109999982 has 16 divisors (see below), whose sum is σ = 30291307200. Its totient is φ = 10012934880.

The previous prime is 20109999971. The next prime is 20109999989. The reversal of 20109999982 is 28999990102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20109999989) 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, 1243444 + ... + 1259512.

It is an arithmetic number, because the mean of its divisors is an integer number (1893206700).

Almost surely, 2^20109999982 is an apocalyptic number.

20109999982 is a deficient number, since it is larger than the sum of its proper divisors (10181307218).

20109999982 is a wasteful number, since it uses less digits than its factorization.

20109999982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18651.

The product of its (nonzero) digits is 1889568, while the sum is 58.

The spelling of 20109999982 in words is "twenty billion, one hundred nine million, nine hundred ninety-nine thousand, nine hundred eighty-two".