19068038138 has 4 divisors (see below), whose sum is σ = 28602057210. Its totient is φ = 9534019068.

The previous prime is 19068038111. The next prime is 19068038149. The reversal of 19068038138 is 83183086091.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15580781329 + 3487256809 = 124823^2 + 59053^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19068038092 and 19068038101.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4767009533 + ... + 4767009536.

Almost surely, 2^19068038138 is an apocalyptic number.

19068038138 is a deficient number, since it is larger than the sum of its proper divisors (9534019072).

19068038138 is an equidigital number, since it uses as much as digits as its factorization.

19068038138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9534019071.

The product of its (nonzero) digits is 248832, while the sum is 47.

The spelling of 19068038138 in words is "nineteen billion, sixty-eight million, thirty-eight thousand, one hundred thirty-eight".