18060021 has 24 divisors (see below), whose sum is σ = 29927040. Its totient is φ = 10280736.

The previous prime is 18060017. The next prime is 18060023. The reversal of 18060021 is 12006081.

It is not a de Polignac number, because 18060021 - 2² = 18060017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18059976 and 18060003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18060023) 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 23 ways as a sum of consecutive naturals, for example, 27331 + ... + 27983.

It is an arithmetic number, because the mean of its divisors is an integer number (1246960).

Almost surely, 2^18060021 is an apocalyptic number.

It is an amenable number.

18060021 is a deficient number, since it is larger than the sum of its proper divisors (11867019).

18060021 is a wasteful number, since it uses less digits than its factorization.

18060021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105 (or 1102 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 18060021 is about 4249.7083429337. The cubic root of 18060021 is about 262.3651116505.

The spelling of 18060021 in words is "eighteen million, sixty thousand, twenty-one".