18401129 has 2 divisors, whose sum is σ = 18401130. Its totient is φ = 18401128.

The previous prime is 18401113. The next prime is 18401143. The reversal of 18401129 is 92110481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17682025 + 719104 = 4205^2 + 848^2 .

It is a cyclic number.

It is not a de Polignac number, because 18401129 - 2⁴ = 18401113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18401098 and 18401107.

It is not a weakly prime, because it can be changed into another prime (18401189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9200564 + 9200565.

It is an arithmetic number, because the mean of its divisors is an integer number (9200565).

Almost surely, 2^18401129 is an apocalyptic number.

It is an amenable number.

18401129 is a deficient number, since it is larger than the sum of its proper divisors (1).

18401129 is an equidigital number, since it uses as much as digits as its factorization.

18401129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 18401129 is about 4289.6537156279. The cubic root of 18401129 is about 264.0066238390.

The spelling of 18401129 in words is "eighteen million, four hundred one thousand, one hundred twenty-nine".