18449648 has 20 divisors (see below), whose sum is σ = 40853040. Its totient is φ = 7906944.

The previous prime is 18449603. The next prime is 18449663. The reversal of 18449648 is 84694481.

It is a super-2 number, since 2×18449648² = 680779022647808, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18449599 and 18449608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82253 + ... + 82476.

It is an arithmetic number, because the mean of its divisors is an integer number (2042652).

Almost surely, 2^18449648 is an apocalyptic number.

It is an amenable number.

18449648 is an abundant number, since it is smaller than the sum of its proper divisors (22403392).

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

18449648 is a wasteful number, since it uses less digits than its factorization.

18449648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164744 (or 164738 counting only the distinct ones).

The product of its digits is 221184, while the sum is 44.

The square root of 18449648 is about 4295.3053442101. The cubic root of 18449648 is about 264.2384591709.

The spelling of 18449648 in words is "eighteen million, four hundred forty-nine thousand, six hundred forty-eight".