18946128 has 40 divisors (see below), whose sum is σ = 49623808. Its totient is φ = 6227712.

The previous prime is 18946127. The next prime is 18946153. The reversal of 18946128 is 82164981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18946127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 801 + ... + 6207.

Almost surely, 2^18946128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18946128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24811904).

18946128 is an abundant number, since it is smaller than the sum of its proper divisors (30677680).

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

18946128 is a wasteful number, since it uses less digits than its factorization.

18946128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5491 (or 5485 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 18946128 is about 4352.7150147925. The cubic root of 18946128 is about 266.5877294135.

The spelling of 18946128 in words is "eighteen million, nine hundred forty-six thousand, one hundred twenty-eight".