19848613971 has 4 divisors (see below), whose sum is σ = 26464818632. Its totient is φ = 13232409312.

The previous prime is 19848613969. The next prime is 19848613979. The reversal of 19848613971 is 17931684891.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 19848613971 - 2¹ = 19848613969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19848613979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3308102326 + ... + 3308102331.

It is an arithmetic number, because the mean of its divisors is an integer number (6616204658).

Almost surely, 2^19848613971 is an apocalyptic number.

19848613971 is a deficient number, since it is larger than the sum of its proper divisors (6616204661).

19848613971 is an equidigital number, since it uses as much as digits as its factorization.

19848613971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6616204660.

The product of its digits is 2612736, while the sum is 57.

The spelling of 19848613971 in words is "nineteen billion, eight hundred forty-eight million, six hundred thirteen thousand, nine hundred seventy-one".