205018206311420 has 12 divisors (see below), whose sum is σ = 430538233254024. Its totient is φ = 82007282524560.

The previous prime is 205018206311411. The next prime is 205018206311473. The reversal of 205018206311420 is 24113602810502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5125455157766 + ... + 5125455157805.

It is an arithmetic number, because the mean of its divisors is an integer number (35878186104502).

Almost surely, 2^{205018206311420} is an apocalyptic number.

205018206311420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205018206311420 is an abundant number, since it is smaller than the sum of its proper divisors (225520026942604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205018206311420 is a wasteful number, since it uses less digits than its factorization.

205018206311420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10250910315580 (or 10250910315578 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 205018206311420 in words is "two hundred five trillion, eighteen billion, two hundred six million, three hundred eleven thousand, four hundred twenty".