18354641 has 2 divisors, whose sum is σ = 18354642. Its totient is φ = 18354640.

The previous prime is 18354613. The next prime is 18354647. The reversal of 18354641 is 14645381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17606416 + 748225 = 4196^2 + 865^2 .

It is a cyclic number.

It is not a de Polignac number, because 18354641 - 2¹⁰ = 18353617 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18354598 and 18354607.

It is not a weakly prime, because it can be changed into another prime (18354647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9177320 + 9177321.

It is an arithmetic number, because the mean of its divisors is an integer number (9177321).

Almost surely, 2^18354641 is an apocalyptic number.

It is an amenable number.

18354641 is a deficient number, since it is larger than the sum of its proper divisors (1).

18354641 is an equidigital number, since it uses as much as digits as its factorization.

18354641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

The square root of 18354641 is about 4284.2316697396. The cubic root of 18354641 is about 263.7841105004.

The spelling of 18354641 in words is "eighteen million, three hundred fifty-four thousand, six hundred forty-one".