18330577421 has 8 divisors (see below), whose sum is σ = 20598910080. Its totient is φ = 16184857392.

The previous prime is 18330577393. The next prime is 18330577451. The reversal of 18330577421 is 12477503381.

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 18330577421 - 2³⁰ = 17256835597 is a prime.

It is a super-2 number, since 2×18330577421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18330577451) 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, 30652841 + ... + 30653438.

It is an arithmetic number, because the mean of its divisors is an integer number (2574863760).

Almost surely, 2^18330577421 is an apocalyptic number.

It is an amenable number.

18330577421 is a deficient number, since it is larger than the sum of its proper divisors (2268332659).

18330577421 is a wasteful number, since it uses less digits than its factorization.

18330577421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61306315.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 18330577421 in words is "eighteen billion, three hundred thirty million, five hundred seventy-seven thousand, four hundred twenty-one".