18519440630 has 16 divisors (see below), whose sum is σ = 33336583344. Its totient is φ = 7407422880.

The previous prime is 18519440617. The next prime is 18519440669. The reversal of 18519440630 is 3604491581.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315044 + ... + 369176.

It is an arithmetic number, because the mean of its divisors is an integer number (2083536459).

Almost surely, 2^18519440630 is an apocalyptic number.

18519440630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18519440630 is a deficient number, since it is larger than the sum of its proper divisors (14817142714).

18519440630 is a wasteful number, since it uses less digits than its factorization.

18519440630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88351.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 18519440630 in words is "eighteen billion, five hundred nineteen million, four hundred forty thousand, six hundred thirty".