18400654081 has 8 divisors (see below), whose sum is σ = 19032459264. Its totient is φ = 17777563680.

The previous prime is 18400654079. The next prime is 18400654091. The reversal of 18400654081 is 18045600481.

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 18400654081 - 2¹ = 18400654079 is a prime.

It is a super-2 number, since 2×18400654081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18400654081.

It is not an unprimeable number, because it can be changed into a prime (18400654061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2174401 + ... + 2182846.

It is an arithmetic number, because the mean of its divisors is an integer number (2379057408).

Almost surely, 2^18400654081 is an apocalyptic number.

It is an amenable number.

18400654081 is a deficient number, since it is larger than the sum of its proper divisors (631805183).

18400654081 is a wasteful number, since it uses less digits than its factorization.

18400654081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4357391.

The product of its (nonzero) digits is 30720, while the sum is 37.

The spelling of 18400654081 in words is "eighteen billion, four hundred million, six hundred fifty-four thousand, eighty-one".