18645941 has 2 divisors, whose sum is σ = 18645942. Its totient is φ = 18645940.

The previous prime is 18645917. The next prime is 18645953. The reversal of 18645941 is 14954681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18447025 + 198916 = 4295^2 + 446^2 .

It is a cyclic number.

It is not a de Polignac number, because 18645941 - 2¹⁰ = 18644917 is a prime.

It is a super-2 number, since 2×18645941² = 695342231550962, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18645895 and 18645904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18645971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9322970 + 9322971.

It is an arithmetic number, because the mean of its divisors is an integer number (9322971).

Almost surely, 2^18645941 is an apocalyptic number.

It is an amenable number.

18645941 is a deficient number, since it is larger than the sum of its proper divisors (1).

18645941 is an equidigital number, since it uses as much as digits as its factorization.

18645941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 38.

The square root of 18645941 is about 4318.0946029470. The cubic root of 18645941 is about 265.1722672480.

The spelling of 18645941 in words is "eighteen million, six hundred forty-five thousand, nine hundred forty-one".