18451132 has 12 divisors (see below), whose sum is σ = 36902320. Its totient is φ = 7907616.

The previous prime is 18451099. The next prime is 18451133. The reversal of 18451132 is 23115481.

18451132 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 18451097 and 18451106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18451133) 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, 329457 + ... + 329512.

Almost surely, 2^18451132 is an apocalyptic number.

It is an amenable number.

18451132 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18451132 is a wasteful number, since it uses less digits than its factorization.

18451132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658980 (or 658978 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 18451132 is about 4295.4780874776. The cubic root of 18451132 is about 264.2455436667.

The spelling of 18451132 in words is "eighteen million, four hundred fifty-one thousand, one hundred thirty-two".