20091910012 has 24 divisors (see below), whose sum is σ = 37518429200. Its totient is φ = 9386845056.

The previous prime is 20091910001. The next prime is 20091910039. The reversal of 20091910012 is 21001919002.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1805187 + ... + 1816282.

Almost surely, 2^20091910012 is an apocalyptic number.

It is an amenable number.

20091910012 is a deficient number, since it is larger than the sum of its proper divisors (17426519188).

20091910012 is a wasteful number, since it uses less digits than its factorization.

20091910012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3621565 (or 3621563 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

The spelling of 20091910012 in words is "twenty billion, ninety-one million, nine hundred ten thousand, twelve".