19012185368 has 32 divisors (see below), whose sum is σ = 39168360000. Its totient is φ = 8579724960.

The previous prime is 19012185347. The next prime is 19012185373. The reversal of 19012185368 is 86358121091.

It is a super-2 number, since 2×19012185368² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764918 + ... + 789381.

It is an arithmetic number, because the mean of its divisors is an integer number (1224011250).

Almost surely, 2^19012185368 is an apocalyptic number.

It is an amenable number.

19012185368 is an abundant number, since it is smaller than the sum of its proper divisors (20156174632).

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

19012185368 is a wasteful number, since it uses less digits than its factorization.

19012185368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554455 (or 1554451 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 19012185368 in words is "nineteen billion, twelve million, one hundred eighty-five thousand, three hundred sixty-eight".