18672226135 has 4 divisors (see below), whose sum is σ = 22406671368. Its totient is φ = 14937780904.

The previous prime is 18672226121. The next prime is 18672226141. The reversal of 18672226135 is 53162227681.

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

It is a cyclic number.

It is not a de Polignac number, because 18672226135 - 2¹⁵ = 18672193367 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18672226091 and 18672226100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1867222609 + ... + 1867222618.

It is an arithmetic number, because the mean of its divisors is an integer number (5601667842).

Almost surely, 2^18672226135 is an apocalyptic number.

18672226135 is a deficient number, since it is larger than the sum of its proper divisors (3734445233).

18672226135 is an equidigital number, since it uses as much as digits as its factorization.

18672226135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3734445232.

The product of its digits is 241920, while the sum is 43.

The spelling of 18672226135 in words is "eighteen billion, six hundred seventy-two million, two hundred twenty-six thousand, one hundred thirty-five".