18629444 has 6 divisors (see below), whose sum is σ = 32601534. Its totient is φ = 9314720.

The previous prime is 18629441. The next prime is 18629473. The reversal of 18629444 is 44492681.

It can be written as a sum of positive squares in only one way, i.e., 18593344 + 36100 = 4312^2 + 190^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18629398 and 18629407.

It is not an unprimeable number, because it can be changed into a prime (18629441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2328677 + ... + 2328684.

It is an arithmetic number, because the mean of its divisors is an integer number (5433589).

Almost surely, 2^18629444 is an apocalyptic number.

It is an amenable number.

18629444 is a deficient number, since it is larger than the sum of its proper divisors (13972090).

18629444 is a wasteful number, since it uses less digits than its factorization.

18629444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4657365 (or 4657363 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 18629444 is about 4316.1839627152. The cubic root of 18629444 is about 265.0940404343.

The spelling of 18629444 in words is "eighteen million, six hundred twenty-nine thousand, four hundred forty-four".