19378310436 has 27 divisors (see below), whose sum is σ = 48986173873. Its totient is φ = 6459158400.

The previous prime is 19378310423. The next prime is 19378310437. The reversal of 19378310436 is 63401387391.

The square root of 19378310436 is 139206.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 18064972836 + 1313337600 = 134406^2 + 36240^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19378310391 and 19378310400.

It is not an unprimeable number, because it can be changed into a prime (19378310437) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 823636 + ... + 846836.

Almost surely, 2^19378310436 is an apocalyptic number.

19378310436 is the 139206-th square number.

It is an amenable number.

19378310436 is an abundant number, since it is smaller than the sum of its proper divisors (29607863437).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19378310436 is an frugal number, since it uses more digits than its factorization.

19378310436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46412 (or 23206 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 19378310436 in words is "nineteen billion, three hundred seventy-eight million, three hundred ten thousand, four hundred thirty-six".