19662678620 has 24 divisors (see below), whose sum is σ = 44467904544. Its totient is φ = 7260065856.

The previous prime is 19662678611. The next prime is 19662678641. The reversal of 19662678620 is 2687626691.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37812584 + ... + 37813103.

It is an arithmetic number, because the mean of its divisors is an integer number (1852829356).

Almost surely, 2^19662678620 is an apocalyptic number.

19662678620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19662678620 is an abundant number, since it is smaller than the sum of its proper divisors (24805225924).

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

19662678620 is a wasteful number, since it uses less digits than its factorization.

19662678620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75625709 (or 75625707 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 19662678620 in words is "nineteen billion, six hundred sixty-two million, six hundred seventy-eight thousand, six hundred twenty".