18345654381 has 8 divisors (see below), whose sum is σ = 25524388800. Its totient is φ = 11698678112.

The previous prime is 18345654377. The next prime is 18345654407.

18345654381 is nontrivially palindromic in base 10.

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 18345654381 - 2² = 18345654377 is a prime.

It is a super-2 number, since 2×18345654381² (a number of 21 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 18345654381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18345654361) 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, 132939456 + ... + 132939593.

It is an arithmetic number, because the mean of its divisors is an integer number (3190548600).

Almost surely, 2^18345654381 is an apocalyptic number.

It is an amenable number.

18345654381 is a deficient number, since it is larger than the sum of its proper divisors (7178734419).

18345654381 is a wasteful number, since it uses less digits than its factorization.

18345654381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265879075.

The product of its digits is 1382400, while the sum is 48.

The spelling of 18345654381 in words is "eighteen billion, three hundred forty-five million, six hundred fifty-four thousand, three hundred eighty-one".