18430037 has 2 divisors, whose sum is σ = 18430038. Its totient is φ = 18430036.

The previous prime is 18429979. The next prime is 18430043. The reversal of 18430037 is 73003481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10982596 + 7447441 = 3314^2 + 2729^2 .

It is a cyclic number.

It is not a de Polignac number, because 18430037 - 2⁶ = 18429973 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18429988 and 18430015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18430637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9215018 + 9215019.

It is an arithmetic number, because the mean of its divisors is an integer number (9215019).

Almost surely, 2^18430037 is an apocalyptic number.

It is an amenable number.

18430037 is a deficient number, since it is larger than the sum of its proper divisors (1).

18430037 is an equidigital number, since it uses as much as digits as its factorization.

18430037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 18430037 is about 4293.0218960541. The cubic root of 18430037 is about 264.1448021435.

The spelling of 18430037 in words is "eighteen million, four hundred thirty thousand, thirty-seven".