20012099999 has 16 divisors (see below), whose sum is σ = 21301363200. Its totient is φ = 18746984736.

The previous prime is 20012099981. The next prime is 20012100011. The reversal of 20012099999 is 99999021002.

It is a cyclic number.

It is not a de Polignac number, because 20012099999 - 2⁸ = 20012099743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012099909) 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 15 ways as a sum of consecutive naturals, for example, 1380302 + ... + 1394724.

It is an arithmetic number, because the mean of its divisors is an integer number (1331335200).

Almost surely, 2^20012099999 is an apocalyptic number.

20012099999 is a deficient number, since it is larger than the sum of its proper divisors (1289263201).

20012099999 is a wasteful number, since it uses less digits than its factorization.

20012099999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15254.

The product of its (nonzero) digits is 236196, while the sum is 50.

The spelling of 20012099999 in words is "twenty billion, twelve million, ninety-nine thousand, nine hundred ninety-nine".