20067555221 has 16 divisors (see below), whose sum is σ = 23680957440. Its totient is φ = 16641123840.

The previous prime is 20067555181. The next prime is 20067555253. The reversal of 20067555221 is 12255576002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20067555221 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20067555281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 884795 + ... + 907191.

It is an arithmetic number, because the mean of its divisors is an integer number (1480059840).

Almost surely, 2^20067555221 is an apocalyptic number.

It is an amenable number.

20067555221 is a deficient number, since it is larger than the sum of its proper divisors (3613402219).

20067555221 is a wasteful number, since it uses less digits than its factorization.

20067555221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26564.

The product of its (nonzero) digits is 42000, while the sum is 35.

The spelling of 20067555221 in words is "twenty billion, sixty-seven million, five hundred fifty-five thousand, two hundred twenty-one".