1980812493 has 12 divisors (see below), whose sum is σ = 3121280448. Its totient is φ = 1200492360.

The previous prime is 1980812423. The next prime is 1980812497. The reversal of 1980812493 is 3942180891.

1980812493 is a `hidden beast` number, since 1 + 9 + 80 + 81 + 2 + 493 = 666.

It is not a de Polignac number, because 1980812493 - 2⁹ = 1980811981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980812497) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10004005 + ... + 10004202.

It is an arithmetic number, because the mean of its divisors is an integer number (260106704).

Almost surely, 2^1980812493 is an apocalyptic number.

It is an amenable number.

1980812493 is a deficient number, since it is larger than the sum of its proper divisors (1140467955).

1980812493 is a wasteful number, since it uses less digits than its factorization.

1980812493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20008224 (or 20008221 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 1980812493 is about 44506.3196973194. The cubic root of 1980812493 is about 1255.8789719767.

The spelling of 1980812493 in words is "one billion, nine hundred eighty million, eight hundred twelve thousand, four hundred ninety-three".