19038891380 has 12 divisors (see below), whose sum is σ = 39981671940. Its totient is φ = 7615556544.

The previous prime is 19038891373. The next prime is 19038891449. The reversal of 19038891380 is 8319883091.

It can be written as a sum of positive squares in 2 ways, for example, as 5227000804 + 13811890576 = 72298^2 + 117524^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 475972265 + ... + 475972304.

It is an arithmetic number, because the mean of its divisors is an integer number (3331805995).

Almost surely, 2^19038891380 is an apocalyptic number.

19038891380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19038891380 is an abundant number, since it is smaller than the sum of its proper divisors (20942780560).

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

19038891380 is a wasteful number, since it uses less digits than its factorization.

19038891380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951944578 (or 951944576 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 50.

The spelling of 19038891380 in words is "nineteen billion, thirty-eight million, eight hundred ninety-one thousand, three hundred eighty".