19245457984 has 21 divisors (see below), whose sum is σ = 38192408121. Its totient is φ = 9622174080.

The previous prime is 19245457969. The next prime is 19245457993. The reversal of 19245457984 is 48975454291.

The square root of 19245457984 is 138728.

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., 17337515584 + 1907942400 = 131672^2 + 43680^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1101154 + ... + 1118494.

It is an arithmetic number, because the mean of its divisors is an integer number (1818686101).

Almost surely, 2^19245457984 is an apocalyptic number.

19245457984 is the 138728-th square number.

It is an amenable number.

19245457984 is a deficient number, since it is larger than the sum of its proper divisors (18946950137).

19245457984 is an frugal number, since it uses more digits than its factorization.

19245457984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34694 (or 17343 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 58.

The spelling of 19245457984 in words is "nineteen billion, two hundred forty-five million, four hundred fifty-seven thousand, nine hundred eighty-four".