18936312294388 has 6 divisors (see below), whose sum is σ = 33138546515186. Its totient is φ = 9468156147192.

The previous prime is 18936312294373. The next prime is 18936312294391. The reversal of 18936312294388 is 88349221363981.

It can be written as a sum of positive squares in only one way, i.e., 10317085328484 + 8619226965904 = 3212022^2 + 2935852^2 .

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, 2367039036795 + ... + 2367039036802.

Almost surely, 2^{18936312294388} is an apocalyptic number.

It is an amenable number.

18936312294388 is a deficient number, since it is larger than the sum of its proper divisors (14202234220798).

18936312294388 is a wasteful number, since it uses less digits than its factorization.

18936312294388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4734078073601 (or 4734078073599 counting only the distinct ones).

The product of its digits is 107495424, while the sum is 67.

The spelling of 18936312294388 in words is "eighteen trillion, nine hundred thirty-six billion, three hundred twelve million, two hundred ninety-four thousand, three hundred eighty-eight".