19975367971 has 8 divisors (see below), whose sum is σ = 21580667360. Its totient is φ = 18379887552.

The previous prime is 19975367953. The next prime is 19975367987. The reversal of 19975367971 is 17976357991.

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

It is not a de Polignac number, because 19975367971 - 2¹³ = 19975359779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19975364971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2450511 + ... + 2458648.

It is an arithmetic number, because the mean of its divisors is an integer number (2697583420).

Almost surely, 2^19975367971 is an apocalyptic number.

19975367971 is a deficient number, since it is larger than the sum of its proper divisors (1605299389).

19975367971 is a wasteful number, since it uses less digits than its factorization.

19975367971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4909485.

The product of its digits is 22504230, while the sum is 64.

The spelling of 19975367971 in words is "nineteen billion, nine hundred seventy-five million, three hundred sixty-seven thousand, nine hundred seventy-one".