20675109999 has 8 divisors (see below), whose sum is σ = 27569705392. Its totient is φ = 13781960640.

The previous prime is 20675109971. The next prime is 20675110019. The reversal of 20675109999 is 99990157602.

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

It is a de Polignac number, because none of the positive numbers 2^k-20675109999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20675105999) 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, 327694 + ... + 385659.

It is an arithmetic number, because the mean of its divisors is an integer number (3446213174).

Almost surely, 2^20675109999 is an apocalyptic number.

20675109999 is a deficient number, since it is larger than the sum of its proper divisors (6894595393).

20675109999 is an equidigital number, since it uses as much as digits as its factorization.

20675109999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723017.

The product of its (nonzero) digits is 2755620, while the sum is 57.

The spelling of 20675109999 in words is "twenty billion, six hundred seventy-five million, one hundred nine thousand, nine hundred ninety-nine".