19975367908 has 6 divisors (see below), whose sum is σ = 34956893846. Its totient is φ = 9987683952.

The previous prime is 19975367879. The next prime is 19975367953. The reversal of 19975367908 is 80976357991.

It can be written as a sum of positive squares in only one way, i.e., 18028969984 + 1946397924 = 134272^2 + 44118^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19975367908.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2496920985 + ... + 2496920992.

Almost surely, 2^19975367908 is an apocalyptic number.

It is an amenable number.

19975367908 is a deficient number, since it is larger than the sum of its proper divisors (14981525938).

19975367908 is a wasteful number, since it uses less digits than its factorization.

19975367908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4993841981 (or 4993841979 counting only the distinct ones).

The product of its (nonzero) digits is 25719120, while the sum is 64.

The spelling of 19975367908 in words is "nineteen billion, nine hundred seventy-five million, three hundred sixty-seven thousand, nine hundred eight".