18479136 has 144 divisors (see below), whose sum is σ = 56445984. Its totient is φ = 5271552.

The previous prime is 18479117. The next prime is 18479137. The reversal of 18479136 is 63197481.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 18479094 and 18479103.

It is not an unprimeable number, because it can be changed into a prime (18479137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 275775 + ... + 275841.

It is an arithmetic number, because the mean of its divisors is an integer number (391986).

Almost surely, 2^18479136 is an apocalyptic number.

18479136 is a gapful number since it is divisible by the number (16) 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 18479136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28222992).

18479136 is an abundant number, since it is smaller than the sum of its proper divisors (37966848).

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

18479136 is a wasteful number, since it uses less digits than its factorization.

18479136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 102 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 18479136 is about 4298.7365585716. The cubic root of 18479136 is about 264.3791613337.

The spelling of 18479136 in words is "eighteen million, four hundred seventy-nine thousand, one hundred thirty-six".