18148606426 has 4 divisors (see below), whose sum is σ = 27222909642. Its totient is φ = 9074303212.

The previous prime is 18148606423. The next prime is 18148606433. The reversal of 18148606426 is 62460684181.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17298825625 + 849780801 = 131525^2 + 29151^2 .

It is not an unprimeable number, because it can be changed into a prime (18148606423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4537151605 + ... + 4537151608.

Almost surely, 2^18148606426 is an apocalyptic number.

18148606426 is a deficient number, since it is larger than the sum of its proper divisors (9074303216).

18148606426 is an equidigital number, since it uses as much as digits as its factorization.

18148606426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9074303215.

The product of its (nonzero) digits is 442368, while the sum is 46.

The spelling of 18148606426 in words is "eighteen billion, one hundred forty-eight million, six hundred six thousand, four hundred twenty-six".