18373643516 has 6 divisors (see below), whose sum is σ = 32153876160. Its totient is φ = 9186821756.

The previous prime is 18373643501. The next prime is 18373643543. The reversal of 18373643516 is 61534637381.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2296705436 + ... + 2296705443.

It is an arithmetic number, because the mean of its divisors is an integer number (5358979360).

Almost surely, 2^18373643516 is an apocalyptic number.

It is an amenable number.

18373643516 is a deficient number, since it is larger than the sum of its proper divisors (13780232644).

18373643516 is a wasteful number, since it uses less digits than its factorization.

18373643516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4593410883 (or 4593410881 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 47.

The spelling of 18373643516 in words is "eighteen billion, three hundred seventy-three million, six hundred forty-three thousand, five hundred sixteen".