20399904096 has 192 divisors, whose sum is σ = 65647895040. Its totient is φ = 5458083840.

The previous prime is 20399904089. The next prime is 20399904121. The reversal of 20399904096 is 69040999302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 283440 + ... + 348048.

It is an arithmetic number, because the mean of its divisors is an integer number (341916120).

Almost surely, 2^20399904096 is an apocalyptic number.

20399904096 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20399904096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32823947520).

20399904096 is an abundant number, since it is smaller than the sum of its proper divisors (45247990944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20399904096 is a wasteful number, since it uses less digits than its factorization.

20399904096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64669 (or 64661 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 51.

The spelling of 20399904096 in words is "twenty billion, three hundred ninety-nine million, nine hundred four thousand, ninety-six".