19004552449 has 9 divisors (see below), whose sum is σ = 19641795201. Its totient is φ = 18387366660.

The previous prime is 19004552431. The next prime is 19004552473. The reversal of 19004552449 is 94425540091.

The square root of 19004552449 is 137857.

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

It is not a de Polignac number, because 19004552449 - 2⁵ = 19004552417 is a prime.

It is a super-2 number, since 2×19004552449² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19004552249) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4271344 + ... + 4275790.

It is an arithmetic number, because the mean of its divisors is an integer number (2182421689).

Almost surely, 2^19004552449 is an apocalyptic number.

19004552449 is the 137857-th square number.

19004552449 is the 68929-th centered octagonal number.

It is an amenable number.

19004552449 is a deficient number, since it is larger than the sum of its proper divisors (637242752).

19004552449 is an frugal number, since it uses more digits than its factorization.

19004552449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8956 (or 4478 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 19004552449 in words is "nineteen billion, four million, five hundred fifty-two thousand, four hundred forty-nine".