19375478947 has 8 divisors (see below), whose sum is σ = 21266562240. Its totient is φ = 17506008360.

The previous prime is 19375478929. The next prime is 19375478953. The reversal of 19375478947 is 74987457391.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19375478947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19375478957) 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, 5401297 + ... + 5404882.

It is an arithmetic number, because the mean of its divisors is an integer number (2658320280).

Almost surely, 2^19375478947 is an apocalyptic number.

19375478947 is a deficient number, since it is larger than the sum of its proper divisors (1891083293).

19375478947 is a wasteful number, since it uses less digits than its factorization.

19375478947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10806353.

The product of its digits is 53343360, while the sum is 64.

The spelling of 19375478947 in words is "nineteen billion, three hundred seventy-five million, four hundred seventy-eight thousand, nine hundred forty-seven".