18434439707 has 2 divisors, whose sum is σ = 18434439708. Its totient is φ = 18434439706.

The previous prime is 18434439677. The next prime is 18434439769. The reversal of 18434439707 is 70793443481.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18434439707 - 2⁸ = 18434439451 is a prime.

It is a super-2 number, since 2×18434439707² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18434439797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9217219853 + 9217219854.

It is an arithmetic number, because the mean of its divisors is an integer number (9217219854).

Almost surely, 2^18434439707 is an apocalyptic number.

18434439707 is a deficient number, since it is larger than the sum of its proper divisors (1).

18434439707 is an equidigital number, since it uses as much as digits as its factorization.

18434439707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 18434439707 in words is "eighteen billion, four hundred thirty-four million, four hundred thirty-nine thousand, seven hundred seven".