18612929 has 2 divisors, whose sum is σ = 18612930. Its totient is φ = 18612928.

The previous prime is 18612899. The next prime is 18612941. The reversal of 18612929 is 92921681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14899600 + 3713329 = 3860^2 + 1927^2 .

It is an emirp because it is prime and its reverse (92921681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18612929 - 2⁸ = 18612673 is a prime.

It is a super-2 number, since 2×18612929² = 692882251918082, 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 = 18612892 and 18612901.

It is not a weakly prime, because it can be changed into another prime (18612959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9306464 + 9306465.

It is an arithmetic number, because the mean of its divisors is an integer number (9306465).

Almost surely, 2^18612929 is an apocalyptic number.

It is an amenable number.

18612929 is a deficient number, since it is larger than the sum of its proper divisors (1).

18612929 is an equidigital number, since it uses as much as digits as its factorization.

18612929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 38.

The square root of 18612929 is about 4314.2703902282. The cubic root of 18612929 is about 265.0156819959.

The spelling of 18612929 in words is "eighteen million, six hundred twelve thousand, nine hundred twenty-nine".