20200111109979 has 4 divisors (see below), whose sum is σ = 26933481479976. Its totient is φ = 13466740739984.

The previous prime is 20200111109953. The next prime is 20200111110019. The reversal of 20200111109979 is 97990111100202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20200111109979 - 2¹³ = 20200111101787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20200111109979.

It is not an unprimeable number, because it can be changed into a prime (20200111109279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3366685184994 + ... + 3366685184999.

It is an arithmetic number, because the mean of its divisors is an integer number (6733370369994).

Almost surely, 2^{20200111109979} is an apocalyptic number.

20200111109979 is a deficient number, since it is larger than the sum of its proper divisors (6733370369997).

20200111109979 is an equidigital number, since it uses as much as digits as its factorization.

20200111109979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6733370369996.

The product of its (nonzero) digits is 20412, while the sum is 42.

The spelling of 20200111109979 in words is "twenty trillion, two hundred billion, one hundred eleven million, one hundred nine thousand, nine hundred seventy-nine".