1992198021902 has 48 divisors (see below), whose sum is σ = 3306631582800. Its totient is φ = 899492584320.

The previous prime is 1992198021887. The next prime is 1992198021917. The reversal of 1992198021902 is 2091208912991.

It is an interprime number because it is at equal distance from previous prime (1992198021887) and next prime (1992198021917).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76867298 + ... + 76893210.

It is an arithmetic number, because the mean of its divisors is an integer number (68888157975).

Almost surely, 2^{1992198021902} is an apocalyptic number.

1992198021902 is a deficient number, since it is larger than the sum of its proper divisors (1314433560898).

1992198021902 is a wasteful number, since it uses less digits than its factorization.

1992198021902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28049 (or 28038 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 53.

The spelling of 1992198021902 in words is "one trillion, nine hundred ninety-two billion, one hundred ninety-eight million, twenty-one thousand, nine hundred two".