18512325406 has 8 divisors (see below), whose sum is σ = 29401928640. Its totient is φ = 8711682528.

The previous prime is 18512325401. The next prime is 18512325449. The reversal of 18512325406 is 60452321581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18512325401) 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, 272240046 + ... + 272240113.

It is an arithmetic number, because the mean of its divisors is an integer number (3675241080).

Almost surely, 2^18512325406 is an apocalyptic number.

18512325406 is a deficient number, since it is larger than the sum of its proper divisors (10889603234).

18512325406 is a wasteful number, since it uses less digits than its factorization.

18512325406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544480178.

The product of its (nonzero) digits is 57600, while the sum is 37.

Adding to 18512325406 its reverse (60452321581), we get a palindrome (78964646987).

The spelling of 18512325406 in words is "eighteen billion, five hundred twelve million, three hundred twenty-five thousand, four hundred six".