19108923144 has 16 divisors (see below), whose sum is σ = 47772307920. Its totient is φ = 6369641040.

The previous prime is 19108923121. The next prime is 19108923149. The reversal of 19108923144 is 44132980191.

It is a junction number, because it is equal to n+sod(n) for n = 19108923096 and 19108923105.

It is not an unprimeable number, because it can be changed into a prime (19108923149) 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, 398102542 + ... + 398102589.

It is an arithmetic number, because the mean of its divisors is an integer number (2985769245).

Almost surely, 2^19108923144 is an apocalyptic number.

It is an amenable number.

19108923144 is an abundant number, since it is smaller than the sum of its proper divisors (28663384776).

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

19108923144 is a wasteful number, since it uses less digits than its factorization.

19108923144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796205140 (or 796205136 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The spelling of 19108923144 in words is "nineteen billion, one hundred eight million, nine hundred twenty-three thousand, one hundred forty-four".