1990309009912 has 16 divisors (see below), whose sum is σ = 3894082845840. Its totient is φ = 951886917696.

The previous prime is 1990309009903. The next prime is 1990309009921. The reversal of 1990309009912 is 2199009030991.

It is an interprime number because it is at equal distance from previous prime (1990309009903) and next prime (1990309009921).

It is a super-2 number, since 2×1990309009912² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1990309009912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5408448213 + ... + 5408448580.

It is an arithmetic number, because the mean of its divisors is an integer number (243380177865).

Almost surely, 2^{1990309009912} is an apocalyptic number.

It is an amenable number.

1990309009912 is a deficient number, since it is larger than the sum of its proper divisors (1903773835928).

1990309009912 is a wasteful number, since it uses less digits than its factorization.

1990309009912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10816896822 (or 10816896818 counting only the distinct ones).

The product of its (nonzero) digits is 354294, while the sum is 52.

The spelling of 1990309009912 in words is "one trillion, nine hundred ninety billion, three hundred nine million, nine thousand, nine hundred twelve".