18860629 has 2 divisors, whose sum is σ = 18860630. Its totient is φ = 18860628.

The previous prime is 18860627. The next prime is 18860641. The reversal of 18860629 is 92606881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12744900 + 6115729 = 3570^2 + 2473^2 .

It is a cyclic number.

It is not a de Polignac number, because 18860629 - 2¹ = 18860627 is a prime.

Together with 18860627, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18860591 and 18860600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18860627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9430314 + 9430315.

It is an arithmetic number, because the mean of its divisors is an integer number (9430315).

Almost surely, 2^18860629 is an apocalyptic number.

It is an amenable number.

18860629 is a deficient number, since it is larger than the sum of its proper divisors (1).

18860629 is an equidigital number, since it uses as much as digits as its factorization.

18860629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 18860629 is about 4342.8825680647. The cubic root of 18860629 is about 266.1861107330.

The spelling of 18860629 in words is "eighteen million, eight hundred sixty thousand, six hundred twenty-nine".