205352018431 has 6 divisors (see below), whose sum is σ = 238878878640. Its totient is φ = 176016015756.

The previous prime is 205352018423. The next prime is 205352018503. The reversal of 205352018431 is 134810253502.

It is not a de Polignac number, because 205352018431 - 2³ = 205352018423 is a prime.

It is a super-2 number, since 2×205352018431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205352018731) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2095428711 + ... + 2095428808.

It is an arithmetic number, because the mean of its divisors is an integer number (39813146440).

Almost surely, 2^205352018431 is an apocalyptic number.

205352018431 is a deficient number, since it is larger than the sum of its proper divisors (33526860209).

205352018431 is an equidigital number, since it uses as much as digits as its factorization.

205352018431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4190857533 (or 4190857526 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 205352018431 in words is "two hundred five billion, three hundred fifty-two million, eighteen thousand, four hundred thirty-one".