19440968686 has 8 divisors (see below), whose sum is σ = 29162999880. Its totient is φ = 9719968728.

The previous prime is 19440968633. The next prime is 19440968747. The reversal of 19440968686 is 68686904491.

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

It is a congruent 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, 208816 + ... + 287203.

It is an arithmetic number, because the mean of its divisors is an integer number (3645374985).

Almost surely, 2^19440968686 is an apocalyptic number.

19440968686 is a deficient number, since it is larger than the sum of its proper divisors (9722031194).

19440968686 is a wasteful number, since it uses less digits than its factorization.

19440968686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515618.

The product of its (nonzero) digits is 17915904, while the sum is 61.

The spelling of 19440968686 in words is "nineteen billion, four hundred forty million, nine hundred sixty-eight thousand, six hundred eighty-six".