20001312099 has 40 divisors (see below), whose sum is σ = 30608314880. Its totient is φ = 13009220784.

The previous prime is 20001312077. The next prime is 20001312113. The reversal of 20001312099 is 99021310002.

It is not a de Polignac number, because 20001312099 - 2¹⁷ = 20001181027 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001312299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3616074 + ... + 3621600.

It is an arithmetic number, because the mean of its divisors is an integer number (765207872).

Almost surely, 2^20001312099 is an apocalyptic number.

20001312099 is a deficient number, since it is larger than the sum of its proper divisors (10607002781).

20001312099 is a wasteful number, since it uses less digits than its factorization.

20001312099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6621 (or 6612 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The spelling of 20001312099 in words is "twenty billion, one million, three hundred twelve thousand, ninety-nine".