19037442693 has 4 divisors (see below), whose sum is σ = 25383256928. Its totient is φ = 12691628460.

The previous prime is 19037442691. The next prime is 19037442703. The reversal of 19037442693 is 39624473091.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 19037442693 - 2¹ = 19037442691 is a prime.

It is a Duffinian 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 in 3 ways as a sum of consecutive naturals, for example, 3172907113 + ... + 3172907118.

It is an arithmetic number, because the mean of its divisors is an integer number (6345814232).

Almost surely, 2^19037442693 is an apocalyptic number.

It is an amenable number.

19037442693 is a deficient number, since it is larger than the sum of its proper divisors (6345814235).

19037442693 is an equidigital number, since it uses as much as digits as its factorization.

19037442693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6345814234.

The product of its (nonzero) digits is 979776, while the sum is 48.

The spelling of 19037442693 in words is "nineteen billion, thirty-seven million, four hundred forty-two thousand, six hundred ninety-three".