205434621119 has 32 divisors (see below), whose sum is σ = 253545600000. Its totient is φ = 162090491904.

The previous prime is 205434621113. The next prime is 205434621121. The reversal of 205434621119 is 911126434502.

It is a cyclic number.

It is not a de Polignac number, because 205434621119 - 2²⁰ = 205433572543 is a prime.

It is a super-2 number, since 2×205434621119² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205434621113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58710632 + ... + 58714130.

It is an arithmetic number, because the mean of its divisors is an integer number (7923300000).

Almost surely, 2^205434621119 is an apocalyptic number.

205434621119 is a deficient number, since it is larger than the sum of its proper divisors (48110978881).

205434621119 is a wasteful number, since it uses less digits than its factorization.

205434621119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5127.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 205434621119 in words is "two hundred five billion, four hundred thirty-four million, six hundred twenty-one thousand, one hundred nineteen".