18779413444 has 27 divisors (see below), whose sum is σ = 36129010701. Its totient is φ = 8534726640.

The previous prime is 18779413427. The next prime is 18779413481. The reversal of 18779413444 is 44431497781.

The square root of 18779413444 is 137038.

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., 9494163844 + 9285249600 = 97438^2 + 96360^2 .

It is a super-2 number, since 2×18779413444² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18779413391 and 18779413400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3011722 + ... + 3017950.

Almost surely, 2^18779413444 is an apocalyptic number.

18779413444 is the 137038-th square number.

It is an amenable number.

18779413444 is a deficient number, since it is larger than the sum of its proper divisors (17349597257).

18779413444 is an frugal number, since it uses more digits than its factorization.

18779413444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12484 (or 6242 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 52.

The spelling of 18779413444 in words is "eighteen billion, seven hundred seventy-nine million, four hundred thirteen thousand, four hundred forty-four".