18477648 has 120 divisors (see below), whose sum is σ = 61746048. Its totient is φ = 5043456.

The previous prime is 18477637. The next prime is 18477649. The reversal of 18477648 is 84677481.

It is a super-2 number, since 2×18477648² = 682846951223808, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18477649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22786 + ... + 23582.

Almost surely, 2^18477648 is an apocalyptic number.

18477648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18477648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30873024).

18477648 is an abundant number, since it is smaller than the sum of its proper divisors (43268400).

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

18477648 is a wasteful number, since it uses less digits than its factorization.

18477648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841 (or 832 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 18477648 is about 4298.5634809783. The cubic root of 18477648 is about 264.3720649206.

The spelling of 18477648 in words is "eighteen million, four hundred seventy-seven thousand, six hundred forty-eight".