18029692409 has 2 divisors, whose sum is σ = 18029692410. Its totient is φ = 18029692408.

The previous prime is 18029692391. The next prime is 18029692459. The reversal of 18029692409 is 90429692081.

It is a happy number.

It is an a-pointer prime, because the next prime (18029692459) can be obtained adding 18029692409 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11236636009 + 6793056400 = 106003^2 + 82420^2 .

It is a cyclic number.

It is not a de Polignac number, because 18029692409 - 2³² = 13734725113 is a prime.

It is not a weakly prime, because it can be changed into another prime (18029692459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9014846204 + 9014846205.

It is an arithmetic number, because the mean of its divisors is an integer number (9014846205).

Almost surely, 2^18029692409 is an apocalyptic number.

It is an amenable number.

18029692409 is a deficient number, since it is larger than the sum of its proper divisors (1).

18029692409 is an equidigital number, since it uses as much as digits as its factorization.

18029692409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 50.

The spelling of 18029692409 in words is "eighteen billion, twenty-nine million, six hundred ninety-two thousand, four hundred nine".