19359139844 has 48 divisors (see below), whose sum is σ = 39440701440. Its totient is φ = 8216732160.

The previous prime is 19359139841. The next prime is 19359139847. The reversal of 19359139844 is 44893195391.

It is an interprime number because it is at equal distance from previous prime (19359139841) and next prime (19359139847).

It is a self number, because there is not a number n which added to its sum of digits gives 19359139844.

It is not an unprimeable number, because it can be changed into a prime (19359139841) 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, 6899 + ... + 196890.

It is an arithmetic number, because the mean of its divisors is an integer number (821681280).

Almost surely, 2^19359139844 is an apocalyptic number.

It is an amenable number.

19359139844 is an abundant number, since it is smaller than the sum of its proper divisors (20081561596).

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

19359139844 is a wasteful number, since it uses less digits than its factorization.

19359139844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203948 (or 203946 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 56.

The spelling of 19359139844 in words is "nineteen billion, three hundred fifty-nine million, one hundred thirty-nine thousand, eight hundred forty-four".