18451633016 has 16 divisors (see below), whose sum is σ = 34602208800. Its totient is φ = 9224377344.

The previous prime is 18451632929. The next prime is 18451633019. The reversal of 18451633016 is 61033615481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18451633019) 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, 124400 + ... + 228863.

It is an arithmetic number, because the mean of its divisors is an integer number (2162638050).

Almost surely, 2^18451633016 is an apocalyptic number.

It is an amenable number.

18451633016 is a deficient number, since it is larger than the sum of its proper divisors (16150575784).

18451633016 is a wasteful number, since it uses less digits than its factorization.

18451633016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359798 (or 359794 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 18451633016 in words is "eighteen billion, four hundred fifty-one million, six hundred thirty-three thousand, sixteen".