19868211642 has 32 divisors (see below), whose sum is σ = 39987872640. Its totient is φ = 6580871360.

The previous prime is 19868211617. The next prime is 19868211673. The reversal of 19868211642 is 24611286891.

It is a junction number, because it is equal to n+sod(n) for n = 19868211591 and 19868211600.

It is an unprimeable number.

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, 2467459 + ... + 2475497.

It is an arithmetic number, because the mean of its divisors is an integer number (1249621020).

Almost surely, 2^19868211642 is an apocalyptic number.

19868211642 is an abundant number, since it is smaller than the sum of its proper divisors (20119660998).

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

19868211642 is a wasteful number, since it uses less digits than its factorization.

19868211642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10598.

The product of its digits is 331776, while the sum is 48.

The spelling of 19868211642 in words is "nineteen billion, eight hundred sixty-eight million, two hundred eleven thousand, six hundred forty-two".