18780767448 has 64 divisors (see below), whose sum is σ = 48499845120. Its totient is φ = 6054144000.

The previous prime is 18780767429. The next prime is 18780767491. The reversal of 18780767448 is 84476708781.

It is a junction number, because it is equal to n+sod(n) for n = 18780767391 and 18780767400.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1183261 + ... + 1199027.

It is an arithmetic number, because the mean of its divisors is an integer number (757810080).

Almost surely, 2^18780767448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18780767448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24249922560).

18780767448 is an abundant number, since it is smaller than the sum of its proper divisors (29719077672).

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

18780767448 is a wasteful number, since it uses less digits than its factorization.

18780767448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17408 (or 17404 counting only the distinct ones).

The product of its (nonzero) digits is 16859136, while the sum is 60.

It can be divided in two parts, 187807 and 67448, that added together give a triangular number (255255 = T₇₁₄).

The spelling of 18780767448 in words is "eighteen billion, seven hundred eighty million, seven hundred sixty-seven thousand, four hundred forty-eight".