19034964638 has 4 divisors (see below), whose sum is σ = 28552446960. Its totient is φ = 9517482318.

The previous prime is 19034964631. The next prime is 19034964643. The reversal of 19034964638 is 83646943091.

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

It is a self number, because there is not a number n which added to its sum of digits gives 19034964638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19034964631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4758741158 + ... + 4758741161.

It is an arithmetic number, because the mean of its divisors is an integer number (7138111740).

Almost surely, 2^19034964638 is an apocalyptic number.

19034964638 is a deficient number, since it is larger than the sum of its proper divisors (9517482322).

19034964638 is an equidigital number, since it uses as much as digits as its factorization.

19034964638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9517482321.

The product of its (nonzero) digits is 3359232, while the sum is 53.

The spelling of 19034964638 in words is "nineteen billion, thirty-four million, nine hundred sixty-four thousand, six hundred thirty-eight".