18389666623011 has 8 divisors (see below), whose sum is σ = 24519576308304. Its totient is φ = 12259767343200.

The previous prime is 18389666622989. The next prime is 18389666623019. The reversal of 18389666623011 is 11032666698381.

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

It is not a de Polignac number, because 18389666623011 - 2⁷ = 18389666622883 is a prime.

It is a super-2 number, since 2×18389666623011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18389666623019) 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, 3709485 + ... + 7109121.

It is an arithmetic number, because the mean of its divisors is an integer number (3064947038538).

Almost surely, 2^{18389666623011} is an apocalyptic number.

18389666623011 is a deficient number, since it is larger than the sum of its proper divisors (6129909685293).

18389666623011 is a wasteful number, since it uses less digits than its factorization.

18389666623011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5202741.

The product of its (nonzero) digits is 13436928, while the sum is 60.

The spelling of 18389666623011 in words is "eighteen trillion, three hundred eighty-nine billion, six hundred sixty-six million, six hundred twenty-three thousand, eleven".