20002399999 has 16 divisors (see below), whose sum is σ = 21229718400. Its totient is φ = 18813314016.

The previous prime is 20002399951. The next prime is 20002400009. The reversal of 20002399999 is 99999320002.

It is a cyclic number.

It is not a de Polignac number, because 20002399999 - 2²⁹ = 19465529087 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 (20002399099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 451452 + ... + 493774.

It is an arithmetic number, because the mean of its divisors is an integer number (1326857400).

Almost surely, 2^20002399999 is an apocalyptic number.

20002399999 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20002399999 is a deficient number, since it is larger than the sum of its proper divisors (1227318401).

20002399999 is a wasteful number, since it uses less digits than its factorization.

20002399999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42774.

The product of its (nonzero) digits is 708588, while the sum is 52.

The spelling of 20002399999 in words is "twenty billion, two million, three hundred ninety-nine thousand, nine hundred ninety-nine".