18856446 has 64 divisors (see below), whose sum is σ = 45163008. Its totient is φ = 5136768.

The previous prime is 18856391. The next prime is 18856469. The reversal of 18856446 is 64465881.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 18856398 and 18856407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95620 + ... + 95816.

It is an arithmetic number, because the mean of its divisors is an integer number (705672).

Almost surely, 2^18856446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18856446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22581504).

18856446 is an abundant number, since it is smaller than the sum of its proper divisors (26306562).

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

18856446 is a wasteful number, since it uses less digits than its factorization.

18856446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305.

The product of its digits is 184320, while the sum is 42.

The square root of 18856446 is about 4342.4009487840. The cubic root of 18856446 is about 266.1664306041.

The spelling of 18856446 in words is "eighteen million, eight hundred fifty-six thousand, four hundred forty-six".