18590629 has 2 divisors, whose sum is σ = 18590630. Its totient is φ = 18590628.

The previous prime is 18590617. The next prime is 18590657. The reversal of 18590629 is 92609581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17833729 + 756900 = 4223^2 + 870^2 .

It is an emirp because it is prime and its reverse (92609581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18590629 - 2⁵ = 18590597 is a prime.

It is a super-2 number, since 2×18590629² = 691222973231282, 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 = 18590591 and 18590600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18590029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9295314 + 9295315.

It is an arithmetic number, because the mean of its divisors is an integer number (9295315).

Almost surely, 2^18590629 is an apocalyptic number.

It is an amenable number.

18590629 is a deficient number, since it is larger than the sum of its proper divisors (1).

18590629 is an equidigital number, since it uses as much as digits as its factorization.

18590629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 18590629 is about 4311.6851693972. The cubic root of 18590629 is about 264.9098019835.

The spelling of 18590629 in words is "eighteen million, five hundred ninety thousand, six hundred twenty-nine".