1820200202019 has 32 divisors (see below), whose sum is σ = 2791042918400. Its totient is φ = 1171174191840.

The previous prime is 1820200201993. The next prime is 1820200202021. The reversal of 1820200202019 is 9102020020281.

It is not a de Polignac number, because 1820200202019 - 2¹⁶ = 1820200136483 is a prime.

It is a super-2 number, since 2×1820200202019² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1820200201983 and 1820200202001.

It is not an unprimeable number, because it can be changed into a prime (1820200202069) 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 31 ways as a sum of consecutive naturals, for example, 2602909 + ... + 3227310.

It is an arithmetic number, because the mean of its divisors is an integer number (87220091200).

Almost surely, 2^{1820200202019} is an apocalyptic number.

1820200202019 is a deficient number, since it is larger than the sum of its proper divisors (970842716381).

1820200202019 is a wasteful number, since it uses less digits than its factorization.

1820200202019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5830632 (or 5830626 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The spelling of 1820200202019 in words is "one trillion, eight hundred twenty billion, two hundred million, two hundred two thousand, nineteen".