19549748134 has 16 divisors (see below), whose sum is σ = 34669504800. Its totient is φ = 8089550784.

The previous prime is 19549748131. The next prime is 19549748159. The reversal of 19549748134 is 43184794591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19549748131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24075639 + ... + 24076450.

It is an arithmetic number, because the mean of its divisors is an integer number (2166844050).

Almost surely, 2^19549748134 is an apocalyptic number.

19549748134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19549748134 is a deficient number, since it is larger than the sum of its proper divisors (15119756666).

19549748134 is a wasteful number, since it uses less digits than its factorization.

19549748134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48152127.

The product of its digits is 4354560, while the sum is 55.

The spelling of 19549748134 in words is "nineteen billion, five hundred forty-nine million, seven hundred forty-eight thousand, one hundred thirty-four".