18231029 has 2 divisors, whose sum is σ = 18231030. Its totient is φ = 18231028.

The previous prime is 18230969. The next prime is 18231049. The reversal of 18231029 is 92013281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18190225 + 40804 = 4265^2 + 202^2 .

It is an emirp because it is prime and its reverse (92013281) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18231029 is a prime.

It is equal to p_1165076 and since 18231029 and 1165076 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 18230989 and 18231007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18231049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9115514 + 9115515.

It is an arithmetic number, because the mean of its divisors is an integer number (9115515).

Almost surely, 2^18231029 is an apocalyptic number.

It is an amenable number.

18231029 is a deficient number, since it is larger than the sum of its proper divisors (1).

18231029 is an equidigital number, since it uses as much as digits as its factorization.

18231029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 18231029 is about 4269.7809077282. The cubic root of 18231029 is about 263.1906120101.

The spelling of 18231029 in words is "eighteen million, two hundred thirty-one thousand, twenty-nine".