20004999999 has 4 divisors (see below), whose sum is σ = 26673333336. Its totient is φ = 13336666664.

The previous prime is 20004999997. The next prime is 20005000013. The reversal of 20004999999 is 99999940002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20004999999 - 2¹ = 20004999997 is a prime.

20004999999 is a modest number, since divided by 999999 gives 20004 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004999997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3334166664 + ... + 3334166669.

It is an arithmetic number, because the mean of its divisors is an integer number (6668333334).

Almost surely, 2^20004999999 is an apocalyptic number.

20004999999 is a deficient number, since it is larger than the sum of its proper divisors (6668333337).

20004999999 is an equidigital number, since it uses as much as digits as its factorization.

20004999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6668333336.

The product of its (nonzero) digits is 4251528, while the sum is 60.

The spelling of 20004999999 in words is "twenty billion, four million, nine hundred ninety-nine thousand, nine hundred ninety-nine".