202018383819 has 24 divisors (see below), whose sum is σ = 333751541760. Its totient is φ = 115348773168.

The previous prime is 202018383811. The next prime is 202018383821. The reversal of 202018383819 is 918383810202.

It is a happy number.

It is not a de Polignac number, because 202018383819 - 2³ = 202018383811 is a prime.

It is a super-2 number, since 2×202018383819² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (202018383811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1172997 + ... + 1334150.

It is an arithmetic number, because the mean of its divisors is an integer number (13906314240).

Almost surely, 2^202018383819 is an apocalyptic number.

202018383819 is a deficient number, since it is larger than the sum of its proper divisors (131733157941).

202018383819 is a wasteful number, since it uses less digits than its factorization.

202018383819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2508439 (or 2508436 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 202018383819 in words is "two hundred two billion, eighteen million, three hundred eighty-three thousand, eight hundred nineteen".