18434140347 has 16 divisors (see below), whose sum is σ = 29568546560. Its totient is φ = 9979384032.

The previous prime is 18434140343. The next prime is 18434140367. The reversal of 18434140347 is 74304143481.

It is not a de Polignac number, because 18434140347 - 2² = 18434140343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18434140343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23100028 + ... + 23100825.

It is an arithmetic number, because the mean of its divisors is an integer number (1848034160).

Almost surely, 2^18434140347 is an apocalyptic number.

18434140347 is a deficient number, since it is larger than the sum of its proper divisors (11134406213).

18434140347 is a wasteful number, since it uses less digits than its factorization.

18434140347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46200882.

The product of its (nonzero) digits is 129024, while the sum is 39.

The spelling of 18434140347 in words is "eighteen billion, four hundred thirty-four million, one hundred forty thousand, three hundred forty-seven".