19037442694 has 4 divisors (see below), whose sum is σ = 28556164044. Its totient is φ = 9518721346.

The previous prime is 19037442691. The next prime is 19037442703. The reversal of 19037442694 is 49624473091.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19037442691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4759360672 + ... + 4759360675.

It is an arithmetic number, because the mean of its divisors is an integer number (7139041011).

Almost surely, 2^19037442694 is an apocalyptic number.

19037442694 is a deficient number, since it is larger than the sum of its proper divisors (9518721350).

19037442694 is an equidigital number, since it uses as much as digits as its factorization.

19037442694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9518721349.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The spelling of 19037442694 in words is "nineteen billion, thirty-seven million, four hundred forty-two thousand, six hundred ninety-four".