19348647834 has 32 divisors (see below), whose sum is σ = 42505044480. Its totient is φ = 5844442032.

The previous prime is 19348647827. The next prime is 19348647839. The reversal of 19348647834 is 43874684391.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (19348647839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3687052 + ... + 3692295.

It is an arithmetic number, because the mean of its divisors is an integer number (1328282640).

Almost surely, 2^19348647834 is an apocalyptic number.

19348647834 is an abundant number, since it is smaller than the sum of its proper divisors (23156396646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19348647834 is a wasteful number, since it uses less digits than its factorization.

19348647834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7379394.

The product of its digits is 13934592, while the sum is 57.

The spelling of 19348647834 in words is "nineteen billion, three hundred forty-eight million, six hundred forty-seven thousand, eight hundred thirty-four".