10399993992 has 24 divisors (see below), whose sum is σ = 28166650590. Its totient is φ = 3466664640.

The previous prime is 10399993963. The next prime is 10399994023. The reversal of 10399993992 is 29939999301.

It can be written as a sum of positive squares in only one way, i.e., 10380756996 + 19236996 = 101886^2 + 4386^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72222109 + ... + 72222252.

Almost surely, 2^10399993992 is an apocalyptic number.

10399993992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

10399993992 is an abundant number, since it is smaller than the sum of its proper divisors (17766656598).

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

10399993992 is a wasteful number, since it uses less digits than its factorization.

10399993992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144444373 (or 144444366 counting only the distinct ones).

The product of its (nonzero) digits is 9565938, while the sum is 63.

The spelling of 10399993992 in words is "ten billion, three hundred ninety-nine million, nine hundred ninety-three thousand, nine hundred ninety-two".