19371797338 has 4 divisors (see below), whose sum is σ = 29057696010. Its totient is φ = 9685898668.

The previous prime is 19371797329. The next prime is 19371797413. The reversal of 19371797338 is 83379717391.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83379717391 = 59 ⋅1413215549.

It can be written as a sum of positive squares in only one way, i.e., 18877935609 + 493861729 = 137397^2 + 22223^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4842949333 + ... + 4842949336.

Almost surely, 2^19371797338 is an apocalyptic number.

19371797338 is a deficient number, since it is larger than the sum of its proper divisors (9685898672).

19371797338 is an equidigital number, since it uses as much as digits as its factorization.

19371797338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9685898671.

The product of its digits is 6001128, while the sum is 58.

The spelling of 19371797338 in words is "nineteen billion, three hundred seventy-one million, seven hundred ninety-seven thousand, three hundred thirty-eight".