18901244 has 6 divisors (see below), whose sum is σ = 33077184. Its totient is φ = 9450620.

The previous prime is 18901237. The next prime is 18901247. The reversal of 18901244 is 44210981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18901247) 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 as a sum of consecutive naturals, namely, 2362652 + ... + 2362659.

It is an arithmetic number, because the mean of its divisors is an integer number (5512864).

Almost surely, 2^18901244 is an apocalyptic number.

It is an amenable number.

18901244 is a deficient number, since it is larger than the sum of its proper divisors (14175940).

18901244 is a wasteful number, since it uses less digits than its factorization.

18901244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4725315 (or 4725313 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 18901244 is about 4347.5560950953. The cubic root of 18901244 is about 266.3770445881.

The spelling of 18901244 in words is "eighteen million, nine hundred one thousand, two hundred forty-four".