19966304490 has 32 divisors (see below), whose sum is σ = 52275416256. Its totient is φ = 4840316160.

The previous prime is 19966304471. The next prime is 19966304537. The reversal of 19966304490 is 9440366991.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30251647 + ... + 30252306.

It is an arithmetic number, because the mean of its divisors is an integer number (1633606758).

Almost surely, 2^19966304490 is an apocalyptic number.

19966304490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19966304490 is an abundant number, since it is smaller than the sum of its proper divisors (32309111766).

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

19966304490 is a wasteful number, since it uses less digits than its factorization.

19966304490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60503974.

The product of its (nonzero) digits is 1259712, while the sum is 51.

The spelling of 19966304490 in words is "nineteen billion, nine hundred sixty-six million, three hundred four thousand, four hundred ninety".