18822744 has 24 divisors (see below), whose sum is σ = 50978460. Its totient is φ = 6274224.

The previous prime is 18822743. The next prime is 18822767. The reversal of 18822744 is 44722881.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18822699 and 18822708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18822743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 130642 + ... + 130785.

Almost surely, 2^18822744 is an apocalyptic number.

It is an amenable number.

18822744 is an abundant number, since it is smaller than the sum of its proper divisors (32155716).

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

18822744 is a wasteful number, since it uses less digits than its factorization.

18822744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261439 (or 261432 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 18822744 is about 4338.5186411954. The cubic root of 18822744 is about 266.0077635437.

The spelling of 18822744 in words is "eighteen million, eight hundred twenty-two thousand, seven hundred forty-four".