19014479449 has 9 divisors (see below), whose sum is σ = 22120007157. Its totient is φ = 16297297884.

The previous prime is 19014479443. The next prime is 19014479453. The reversal of 19014479449 is 94497441091.

The square root of 19014479449 is 137893.

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

It is not a de Polignac number, because 19014479449 - 2³ = 19014479441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19014479396 and 19014479405.

It is not an unprimeable number, because it can be changed into a prime (19014479441) 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, 955402 + ... + 975100.

It is an arithmetic number, because the mean of its divisors is an integer number (2457778573).

Almost surely, 2^19014479449 is an apocalyptic number.

19014479449 is the 137893-rd square number.

19014479449 is the 68947-th centered octagonal number.

It is an amenable number.

19014479449 is a deficient number, since it is larger than the sum of its proper divisors (3105527708).

19014479449 is an frugal number, since it uses more digits than its factorization.

19014479449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39412 (or 19706 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 19014479449 in words is "nineteen billion, fourteen million, four hundred seventy-nine thousand, four hundred forty-nine".