18206621061 has 16 divisors (see below), whose sum is σ = 24428963328. Its totient is φ = 12061062000.

The previous prime is 18206621057. The next prime is 18206621077. The reversal of 18206621061 is 16012660281.

It is not a de Polignac number, because 18206621061 - 2² = 18206621057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18206621011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2928246 + ... + 2934456.

It is an arithmetic number, because the mean of its divisors is an integer number (1526810208).

Almost surely, 2^18206621061 is an apocalyptic number.

It is an amenable number.

18206621061 is a deficient number, since it is larger than the sum of its proper divisors (6222342267).

18206621061 is a wasteful number, since it uses less digits than its factorization.

18206621061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12232.

The product of its (nonzero) digits is 6912, while the sum is 33.

The spelling of 18206621061 in words is "eighteen billion, two hundred six million, six hundred twenty-one thousand, sixty-one".