19057378036 has 12 divisors (see below), whose sum is σ = 33351381028. Its totient is φ = 9528412032.

The previous prime is 19057378009. The next prime is 19057378037. The reversal of 19057378036 is 63087375091.

It can be written as a sum of positive squares in 2 ways, for example, as 749664400 + 18307713636 = 27380^2 + 135306^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19057378037) 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, 217390 + ... + 292186.

Almost surely, 2^19057378036 is an apocalyptic number.

It is an amenable number.

19057378036 is a deficient number, since it is larger than the sum of its proper divisors (14294002992).

19057378036 is a wasteful number, since it uses less digits than its factorization.

19057378036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138498 (or 138496 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 49.

The spelling of 19057378036 in words is "nineteen billion, fifty-seven million, three hundred seventy-eight thousand, thirty-six".