19486484836 has 135 divisors (see below), whose sum is σ = 43715270319. Its totient is φ = 7578279072.

The previous prime is 19486484749. The next prime is 19486484839. The reversal of 19486484836 is 63848468491.

The square root of 19486484836 is 139594.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9661710436 + 9824774400 = 98294^2 + 99120^2 .

Its product of digits (31850496) is a multiple of the sum of its prime divisors (81).

It is not an unprimeable number, because it can be changed into a prime (19486484839) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 330279375 + ... + 330279433.

Almost surely, 2^19486484836 is an apocalyptic number.

19486484836 is the 139594-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19486484836

19486484836 is an abundant number, since it is smaller than the sum of its proper divisors (24228785483).

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

19486484836 is an frugal number, since it uses more digits than its factorization.

19486484836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 81 counting only the distinct ones).

The product of its digits is 31850496, while the sum is 61.

The spelling of 19486484836 in words is "nineteen billion, four hundred eighty-six million, four hundred eighty-four thousand, eight hundred thirty-six".