20102109999 has 8 divisors (see below), whose sum is σ = 26804230272. Its totient is φ = 13400698200.

The previous prime is 20102109977. The next prime is 20102110001. The reversal of 20102109999 is 99990120102.

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

It is not a de Polignac number, because 20102109999 - 2¹⁷ = 20101978927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20102109999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102109919) 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, 106939 + ... + 227244.

It is an arithmetic number, because the mean of its divisors is an integer number (3350528784).

Almost surely, 2^20102109999 is an apocalyptic number.

20102109999 is a deficient number, since it is larger than the sum of its proper divisors (6702120273).

20102109999 is a wasteful number, since it uses less digits than its factorization.

20102109999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354237.

The product of its (nonzero) digits is 26244, while the sum is 42.

The spelling of 20102109999 in words is "twenty billion, one hundred two million, one hundred nine thousand, nine hundred ninety-nine".