18817351448 has 32 divisors (see below), whose sum is σ = 40341382560. Its totient is φ = 8060881920.

The previous prime is 18817351433. The next prime is 18817351471. The reversal of 18817351448 is 84415371881.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18817351396 and 18817351405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48008 + ... + 199848.

It is an arithmetic number, because the mean of its divisors is an integer number (1260668205).

Almost surely, 2^18817351448 is an apocalyptic number.

It is an amenable number.

18817351448 is an abundant number, since it is smaller than the sum of its proper divisors (21524031112).

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

18817351448 is a wasteful number, since it uses less digits than its factorization.

18817351448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154067 (or 154063 counting only the distinct ones).

The product of its digits is 860160, while the sum is 50.

The spelling of 18817351448 in words is "eighteen billion, eight hundred seventeen million, three hundred fifty-one thousand, four hundred forty-eight".