18202002019 has 4 divisors (see below), whose sum is σ = 18230398920. Its totient is φ = 18173605120.

The previous prime is 18202002011. The next prime is 18202002023. The reversal of 18202002019 is 91020020281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91020020281 = 29 ⋅3138621389.

It is a cyclic number.

It is not a de Polignac number, because 18202002019 - 2³ = 18202002011 is a prime.

It is a super-2 number, since 2×18202002019² (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 = 18202001984 and 18202002002.

It is not an unprimeable number, because it can be changed into a prime (18202002011) 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, 14197489 + ... + 14198770.

It is an arithmetic number, because the mean of its divisors is an integer number (4557599730).

Almost surely, 2^18202002019 is an apocalyptic number.

18202002019 is a deficient number, since it is larger than the sum of its proper divisors (28396901).

18202002019 is an equidigital number, since it uses as much as digits as its factorization.

18202002019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28396900.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 18202002019 in words is "eighteen billion, two hundred two million, two thousand, nineteen".