19727936542 has 8 divisors (see below), whose sum is σ = 29594128896. Its totient is φ = 9863226912.

The previous prime is 19727936507. The next prime is 19727936549. The reversal of 19727936542 is 24563972791.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19727936549) 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 3 ways as a sum of consecutive naturals, for example, 336798 + ... + 391009.

It is an arithmetic number, because the mean of its divisors is an integer number (3699266112).

Almost surely, 2^19727936542 is an apocalyptic number.

19727936542 is a deficient number, since it is larger than the sum of its proper divisors (9866192354).

19727936542 is a wasteful number, since it uses less digits than its factorization.

19727936542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741362.

The product of its digits is 5715360, while the sum is 55.

The spelling of 19727936542 in words is "nineteen billion, seven hundred twenty-seven million, nine hundred thirty-six thousand, five hundred forty-two".