18053761221 has 40 divisors (see below), whose sum is σ = 28420054080. Its totient is φ = 11389756032.

The previous prime is 18053761189. The next prime is 18053761237. The reversal of 18053761221 is 12216735081.

18053761221 is a `hidden beast` number, since 1 + 8 + 0 + 5 + 37 + 612 + 2 + 1 = 666.

It is not a de Polignac number, because 18053761221 - 2⁵ = 18053761189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18053761261) 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 39 ways as a sum of consecutive naturals, for example, 1497600 + ... + 1509606.

It is an arithmetic number, because the mean of its divisors is an integer number (710501352).

Almost surely, 2^18053761221 is an apocalyptic number.

It is an amenable number.

18053761221 is a deficient number, since it is larger than the sum of its proper divisors (10366292859).

18053761221 is a wasteful number, since it uses less digits than its factorization.

18053761221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13015 (or 13006 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 18053761221 in words is "eighteen billion, fifty-three million, seven hundred sixty-one thousand, two hundred twenty-one".