18646463248 has 40 divisors (see below), whose sum is σ = 41697420480. Its totient is φ = 7912214400.

The previous prime is 18646463201. The next prime is 18646463261. The reversal of 18646463248 is 84236464681.

It is a junction number, because it is equal to n+sod(n) for n = 18646463195 and 18646463204.

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, 812878 + ... + 835501.

It is an arithmetic number, because the mean of its divisors is an integer number (1042435512).

Almost surely, 2^18646463248 is an apocalyptic number.

It is an amenable number.

18646463248 is an abundant number, since it is smaller than the sum of its proper divisors (23050957232).

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

18646463248 is a wasteful number, since it uses less digits than its factorization.

18646463248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648495 (or 1648489 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 52.

The spelling of 18646463248 in words is "eighteen billion, six hundred forty-six million, four hundred sixty-three thousand, two hundred forty-eight".