20004199985 has 32 divisors (see below), whose sum is σ = 30070324224. Its totient is φ = 12411000000.

The previous prime is 20004199981. The next prime is 20004199991. The reversal of 20004199985 is 58999140002.

It is not a de Polignac number, because 20004199985 - 2² = 20004199981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20004199981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41891 + ... + 204360.

It is an arithmetic number, because the mean of its divisors is an integer number (939697632).

Almost surely, 2^20004199985 is an apocalyptic number.

It is an amenable number.

20004199985 is a deficient number, since it is larger than the sum of its proper divisors (10066124239).

20004199985 is a wasteful number, since it uses less digits than its factorization.

20004199985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246485.

The product of its (nonzero) digits is 233280, while the sum is 47.

The spelling of 20004199985 in words is "twenty billion, four million, one hundred ninety-nine thousand, nine hundred eighty-five".