19885266938 has 8 divisors (see below), whose sum is σ = 29828920800. Its totient is φ = 9942293340.

The previous prime is 19885266923. The next prime is 19885266959. The reversal of 19885266938 is 83966258891.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89318 + ... + 218513.

It is an arithmetic number, because the mean of its divisors is an integer number (3728615100).

Almost surely, 2^19885266938 is an apocalyptic number.

19885266938 is a deficient number, since it is larger than the sum of its proper divisors (9943653862).

19885266938 is a wasteful number, since it uses less digits than its factorization.

19885266938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340132.

The product of its digits is 44789760, while the sum is 65.

The spelling of 19885266938 in words is "nineteen billion, eight hundred eighty-five million, two hundred sixty-six thousand, nine hundred thirty-eight".