19937966395 has 16 divisors (see below), whose sum is σ = 24095700000. Its totient is φ = 15837032448.

The previous prime is 19937966387. The next prime is 19937966423. The reversal of 19937966395 is 59366973991.

It is a cyclic number.

It is not a de Polignac number, because 19937966395 - 2³ = 19937966387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19937966395.

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, 3050491 + ... + 3057019.

It is an arithmetic number, because the mean of its divisors is an integer number (1505981250).

Almost surely, 2^19937966395 is an apocalyptic number.

19937966395 is a deficient number, since it is larger than the sum of its proper divisors (4157733605).

19937966395 is a wasteful number, since it uses less digits than its factorization.

19937966395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10782.

The product of its digits is 74401740, while the sum is 67.

The spelling of 19937966395 in words is "nineteen billion, nine hundred thirty-seven million, nine hundred sixty-six thousand, three hundred ninety-five".