18944129 has 2 divisors, whose sum is σ = 18944130. Its totient is φ = 18944128.

The previous prime is 18944119. The next prime is 18944141. The reversal of 18944129 is 92144981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18939904 + 4225 = 4352^2 + 65^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18944129 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18944092 and 18944101.

It is not a weakly prime, because it can be changed into another prime (18944119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9472064 + 9472065.

It is an arithmetic number, because the mean of its divisors is an integer number (9472065).

Almost surely, 2^18944129 is an apocalyptic number.

It is an amenable number.

18944129 is a deficient number, since it is larger than the sum of its proper divisors (1).

18944129 is an equidigital number, since it uses as much as digits as its factorization.

18944129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 18944129 is about 4352.4853819398. The cubic root of 18944129 is about 266.5783532213.

The spelling of 18944129 in words is "eighteen million, nine hundred forty-four thousand, one hundred twenty-nine".