19462139816 has 64 divisors (see below), whose sum is σ = 43596748800. Its totient is φ = 7963800768.

The previous prime is 19462139797. The next prime is 19462139819. The reversal of 19462139816 is 61893126491.

It is not an unprimeable number, because it can be changed into a prime (19462139819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 711725 + ... + 738563.

It is an arithmetic number, because the mean of its divisors is an integer number (681199200).

Almost surely, 2^19462139816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19462139816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21798374400).

19462139816 is an abundant number, since it is smaller than the sum of its proper divisors (24134608984).

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

19462139816 is a wasteful number, since it uses less digits than its factorization.

19462139816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27438 (or 27434 counting only the distinct ones).

The product of its digits is 559872, while the sum is 50.

The spelling of 19462139816 in words is "nineteen billion, four hundred sixty-two million, one hundred thirty-nine thousand, eight hundred sixteen".