18351485272 has 16 divisors (see below), whose sum is σ = 35905080240. Its totient is φ = 8776797216.

The previous prime is 18351485221. The next prime is 18351485279. The reversal of 18351485272 is 27258415381.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18351485279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49867983 + ... + 49868350.

It is an arithmetic number, because the mean of its divisors is an integer number (2244067515).

Almost surely, 2^18351485272 is an apocalyptic number.

It is an amenable number.

18351485272 is a deficient number, since it is larger than the sum of its proper divisors (17553594968).

18351485272 is a wasteful number, since it uses less digits than its factorization.

18351485272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99736362 (or 99736358 counting only the distinct ones).

The product of its digits is 537600, while the sum is 46.

The spelling of 18351485272 in words is "eighteen billion, three hundred fifty-one million, four hundred eighty-five thousand, two hundred seventy-two".