14521636418 has 4 divisors (see below), whose sum is σ = 21782454630. Its totient is φ = 7260818208.

The previous prime is 14521636417. The next prime is 14521636421. The reversal of 14521636418 is 81463612541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81463612541 = 157 ⋅518876513.

It can be written as a sum of positive squares in only one way, i.e., 14338386049 + 183250369 = 119743^2 + 13537^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (14521636411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3630409103 + ... + 3630409106.

Almost surely, 2^14521636418 is an apocalyptic number.

14521636418 is a deficient number, since it is larger than the sum of its proper divisors (7260818212).

14521636418 is an equidigital number, since it uses as much as digits as its factorization.

14521636418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7260818211.

The product of its digits is 138240, while the sum is 41.

The spelling of 14521636418 in words is "fourteen billion, five hundred twenty-one million, six hundred thirty-six thousand, four hundred eighteen".