19128485380 has 24 divisors (see below), whose sum is σ = 40181870232. Its totient is φ = 7649098752.

The previous prime is 19128485309. The next prime is 19128485381. The reversal of 19128485380 is 8358482191.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13756474944 + 5372010436 = 117288^2 + 73294^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (19128485381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74317 + ... + 209236.

It is an arithmetic number, because the mean of its divisors is an integer number (1674244593).

Almost surely, 2^19128485380 is an apocalyptic number.

19128485380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19128485380 is an abundant number, since it is smaller than the sum of its proper divisors (21053384852).

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

19128485380 is a wasteful number, since it uses less digits than its factorization.

19128485380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286935 (or 286933 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 49.

The spelling of 19128485380 in words is "nineteen billion, one hundred twenty-eight million, four hundred eighty-five thousand, three hundred eighty".