204266522421 has 12 divisors (see below), whose sum is σ = 317747923948. Its totient is φ = 125702475264.

The previous prime is 204266522417. The next prime is 204266522459. The reversal of 204266522421 is 124225662402.

204266522421 is a `hidden beast` number, since 2 + 0 + 426 + 6 + 5 + 224 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 32281308900 + 171985213521 = 179670^2 + 414711^2 .

It is not a de Polignac number, because 204266522421 - 2² = 204266522417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204266522321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 872933740 + ... + 872933973.

Almost surely, 2^204266522421 is an apocalyptic number.

It is an amenable number.

204266522421 is a deficient number, since it is larger than the sum of its proper divisors (113481401527).

204266522421 is a wasteful number, since it uses less digits than its factorization.

204266522421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745867732 (or 1745867729 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The spelling of 204266522421 in words is "two hundred four billion, two hundred sixty-six million, five hundred twenty-two thousand, four hundred twenty-one".