1998810020355 has 32 divisors (see below), whose sum is σ = 3222507322944. Its totient is φ = 1057911968256.

The previous prime is 1998810020329. The next prime is 1998810020371. The reversal of 1998810020355 is 5530200188991.

It is not a de Polignac number, because 1998810020355 - 2²³ = 1998801631747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1998810020298 and 1998810020307.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1344469 + ... + 2409401.

It is an arithmetic number, because the mean of its divisors is an integer number (100703353842).

Almost surely, 2^{1998810020355} is an apocalyptic number.

1998810020355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1998810020355 is a deficient number, since it is larger than the sum of its proper divisors (1223697302589).

1998810020355 is a wasteful number, since it uses less digits than its factorization.

1998810020355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065895.

The product of its (nonzero) digits is 777600, while the sum is 51.

The spelling of 1998810020355 in words is "one trillion, nine hundred ninety-eight billion, eight hundred ten million, twenty thousand, three hundred fifty-five".