19959898990 has 8 divisors (see below), whose sum is σ = 35927818200. Its totient is φ = 7983959592.

The previous prime is 19959898963. The next prime is 19959898997. The reversal of 19959898990 is 9989895991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19959898997) 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, 997994940 + ... + 997994959.

It is an arithmetic number, because the mean of its divisors is an integer number (4490977275).

Almost surely, 2^19959898990 is an apocalyptic number.

19959898990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19959898990 is a deficient number, since it is larger than the sum of its proper divisors (15967919210).

19959898990 is a wasteful number, since it uses less digits than its factorization.

19959898990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995989906.

The product of its (nonzero) digits is 170061120, while the sum is 76.

The spelling of 19959898990 in words is "nineteen billion, nine hundred fifty-nine million, eight hundred ninety-eight thousand, nine hundred ninety".