19961289204 has 48 divisors (see below), whose sum is σ = 47707450560. Its totient is φ = 6492487680.

The previous prime is 19961289203. The next prime is 19961289221. The reversal of 19961289204 is 40298216991.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19961289203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 507892 + ... + 545780.

It is an arithmetic number, because the mean of its divisors is an integer number (993905220).

Almost surely, 2^19961289204 is an apocalyptic number.

It is an amenable number.

19961289204 is an abundant number, since it is smaller than the sum of its proper divisors (27746161356).

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

19961289204 is a wasteful number, since it uses less digits than its factorization.

19961289204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38960 (or 38958 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 51.

The spelling of 19961289204 in words is "nineteen billion, nine hundred sixty-one million, two hundred eighty-nine thousand, two hundred four".