18869029 has 2 divisors, whose sum is σ = 18869030. Its totient is φ = 18869028.

The previous prime is 18869027. The next prime is 18869041. The reversal of 18869029 is 92096881.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14861025 + 4008004 = 3855^2 + 2002^2 .

It is a cyclic number.

It is not a de Polignac number, because 18869029 - 2¹ = 18869027 is a prime.

Together with 18869027, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18869023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9434514 + 9434515.

It is an arithmetic number, because the mean of its divisors is an integer number (9434515).

Almost surely, 2^18869029 is an apocalyptic number.

It is an amenable number.

18869029 is a deficient number, since it is larger than the sum of its proper divisors (1).

18869029 is an equidigital number, since it uses as much as digits as its factorization.

18869029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 18869029 is about 4343.8495600101. The cubic root of 18869029 is about 266.2256221665.

The spelling of 18869029 in words is "eighteen million, eight hundred sixty-nine thousand, twenty-nine".