18396888281 has 8 divisors (see below), whose sum is σ = 18440689344. Its totient is φ = 18353133360.

The previous prime is 18396888277. The next prime is 18396888319. The reversal of 18396888281 is 18288869381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18396888281 - 2² = 18396888277 is a prime.

It is a super-2 number, since 2×18396888281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18396888271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864236 + ... + 885266.

It is an arithmetic number, because the mean of its divisors is an integer number (2305086168).

Almost surely, 2^18396888281 is an apocalyptic number.

It is an amenable number.

18396888281 is a deficient number, since it is larger than the sum of its proper divisors (43801063).

18396888281 is a wasteful number, since it uses less digits than its factorization.

18396888281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23071.

The product of its digits is 10616832, while the sum is 62.

The spelling of 18396888281 in words is "eighteen billion, three hundred ninety-six million, eight hundred eighty-eight thousand, two hundred eighty-one".