18812444 has 24 divisors (see below), whose sum is σ = 38158848. Its totient is φ = 7948080.

The previous prime is 18812441. The next prime is 18812449. The reversal of 18812444 is 44421881.

It is a self number, because there is not a number n which added to its sum of digits gives 18812444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18812441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2744 + ... + 6719.

It is an arithmetic number, because the mean of its divisors is an integer number (1589952).

Almost surely, 2^18812444 is an apocalyptic number.

18812444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18812444 is an abundant number, since it is smaller than the sum of its proper divisors (19346404).

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

18812444 is a wasteful number, since it uses less digits than its factorization.

18812444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9545 (or 9543 counting only the distinct ones).

The product of its digits is 8192, while the sum is 32.

The square root of 18812444 is about 4337.3314376469. The cubic root of 18812444 is about 265.9592339585.

The spelling of 18812444 in words is "eighteen million, eight hundred twelve thousand, four hundred forty-four".