18435272236 has 6 divisors (see below), whose sum is σ = 32261726420. Its totient is φ = 9217636116.

The previous prime is 18435272201. The next prime is 18435272257. The reversal of 18435272236 is 63227253481.

It is a junction number, because it is equal to n+sod(n) for n = 18435272192 and 18435272201.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2304409026 + ... + 2304409033.

Almost surely, 2^18435272236 is an apocalyptic number.

It is an amenable number.

18435272236 is a deficient number, since it is larger than the sum of its proper divisors (13826454184).

18435272236 is a wasteful number, since it uses less digits than its factorization.

18435272236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4608818063 (or 4608818061 counting only the distinct ones).

The product of its digits is 483840, while the sum is 43.

The spelling of 18435272236 in words is "eighteen billion, four hundred thirty-five million, two hundred seventy-two thousand, two hundred thirty-six".