19990025996 has 12 divisors (see below), whose sum is σ = 34984208448. Its totient is φ = 9994537872.

The previous prime is 19990025971. The next prime is 19990026013. The reversal of 19990025996 is 69952009991.

It is a super-2 number, since 2×19990025996² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13811 + ... + 200426.

It is an arithmetic number, because the mean of its divisors is an integer number (2915350704).

Almost surely, 2^19990025996 is an apocalyptic number.

It is an amenable number.

19990025996 is a deficient number, since it is larger than the sum of its proper divisors (14994182452).

19990025996 is a wasteful number, since it uses less digits than its factorization.

19990025996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237568 (or 237566 counting only the distinct ones).

The product of its (nonzero) digits is 3542940, while the sum is 59.

The spelling of 19990025996 in words is "nineteen billion, nine hundred ninety million, twenty-five thousand, nine hundred ninety-six".