19849428544 has 63 divisors (see below), whose sum is σ = 43322087473. Its totient is φ = 9016832000.

The previous prime is 19849428539. The next prime is 19849428583. The reversal of 19849428544 is 44582494891.

The square root of 19849428544 is 140888.

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., 19799866944 + 49561600 = 140712^2 + 7040^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12397344 + ... + 12398944.

Almost surely, 2^19849428544 is an apocalyptic number.

19849428544 is the 140888-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19849428544

19849428544 is an abundant number, since it is smaller than the sum of its proper divisors (23472658929).

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

19849428544 is an frugal number, since it uses more digits than its factorization.

19849428544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3236 (or 1614 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 58.

The spelling of 19849428544 in words is "nineteen billion, eight hundred forty-nine million, four hundred twenty-eight thousand, five hundred forty-four".