205420461235636 has 24 divisors (see below), whose sum is σ = 363820329774720. Its totient is φ = 101471818499712.

The previous prime is 205420461235609. The next prime is 205420461235637. The reversal of 205420461235636 is 636532164024502.

It is a super-2 number, since 2×205420461235636² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 205420461235636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205420461235637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33753685 + ... + 39371971.

It is an arithmetic number, because the mean of its divisors is an integer number (15159180407280).

Almost surely, 2^{205420461235636} is an apocalyptic number.

It is an amenable number.

205420461235636 is a deficient number, since it is larger than the sum of its proper divisors (158399868539084).

205420461235636 is a wasteful number, since it uses less digits than its factorization.

205420461235636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5728503 (or 5728501 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 49.

The spelling of 205420461235636 in words is "two hundred five trillion, four hundred twenty billion, four hundred sixty-one million, two hundred thirty-five thousand, six hundred thirty-six".