20200120019 has 4 divisors (see below), whose sum is σ = 20669890296. Its totient is φ = 19730349744.

The previous prime is 20200120007. The next prime is 20200120091. The reversal of 20200120019 is 91002100202.

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 20200120019 - 2²⁰ = 20199071443 is a prime.

It is a super-2 number, since 2×20200120019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20200119979 and 20200120006.

It is not an unprimeable number, because it can be changed into a prime (20202120019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234885074 + ... + 234885159.

It is an arithmetic number, because the mean of its divisors is an integer number (5167472574).

Almost surely, 2^20200120019 is an apocalyptic number.

20200120019 is a deficient number, since it is larger than the sum of its proper divisors (469770277).

20200120019 is an equidigital number, since it uses as much as digits as its factorization.

20200120019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469770276.

The product of its (nonzero) digits is 72, while the sum is 17.

The spelling of 20200120019 in words is "twenty billion, two hundred million, one hundred twenty thousand, nineteen".