19118390084 has 6 divisors (see below), whose sum is σ = 33457182654. Its totient is φ = 9559195040.

The previous prime is 19118390063. The next prime is 19118390087. The reversal of 19118390084 is 48009381191.

It can be written as a sum of positive squares in only one way, i.e., 17158380100 + 1960009984 = 130990^2 + 44272^2 .

It is a super-3 number, since 3×19118390084³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (19118390087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2389798757 + ... + 2389798764.

It is an arithmetic number, because the mean of its divisors is an integer number (5576197109).

Almost surely, 2^19118390084 is an apocalyptic number.

It is an amenable number.

19118390084 is a deficient number, since it is larger than the sum of its proper divisors (14338792570).

19118390084 is a wasteful number, since it uses less digits than its factorization.

19118390084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4779597525 (or 4779597523 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 44.

The spelling of 19118390084 in words is "nineteen billion, one hundred eighteen million, three hundred ninety thousand, eighty-four".