18234006578 has 6 divisors (see below), whose sum is σ = 27351296319. Its totient is φ = 9116907806.

The previous prime is 18234006577. The next prime is 18234006599. The reversal of 18234006578 is 87560043281.

It can be written as a sum of positive squares in only one way, i.e., 9117003289 + 9117003289 = 95483^2 + 95483^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=95483.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18234006577) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 143225 + ... + 238707.

Almost surely, 2^18234006578 is an apocalyptic number.

18234006578 is a deficient number, since it is larger than the sum of its proper divisors (9117289741).

18234006578 is an frugal number, since it uses more digits than its factorization.

18234006578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190968 (or 95485 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 18234006578 in words is "eighteen billion, two hundred thirty-four million, six thousand, five hundred seventy-eight".