18393019998936 has 64 divisors (see below), whose sum is σ = 50205914881920. Its totient is φ = 5568849861120.

The previous prime is 18393019998923. The next prime is 18393019999099. The reversal of 18393019998936 is 63989991039381.

It is a super-2 number, since 2×18393019998936² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29645905 + ... + 30259968.

It is an arithmetic number, because the mean of its divisors is an integer number (784467420030).

Almost surely, 2^{18393019998936} is an apocalyptic number.

It is an amenable number.

18393019998936 is an abundant number, since it is smaller than the sum of its proper divisors (31812894882984).

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

18393019998936 is a wasteful number, since it uses less digits than its factorization.

18393019998936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59907056 (or 59907052 counting only the distinct ones).

The product of its (nonzero) digits is 612220032, while the sum is 78.

The spelling of 18393019998936 in words is "eighteen trillion, three hundred ninety-three billion, nineteen million, nine hundred ninety-eight thousand, nine hundred thirty-six".