205416423 has 12 divisors (see below), whose sum is σ = 314166528. Its totient is φ = 128888640.

The previous prime is 205416401. The next prime is 205416469. The reversal of 205416423 is 324614502.

205416423 is a `hidden beast` number, since 205 + 416 + 42 + 3 = 666.

It is not a de Polignac number, because 205416423 - 2¹⁷ = 205285351 is a prime.

It is a super-2 number, since 2×205416423² = 84391813676229858, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205416493) 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, 671143 + ... + 671448.

It is an arithmetic number, because the mean of its divisors is an integer number (26180544).

Almost surely, 2^205416423 is an apocalyptic number.

205416423 is a deficient number, since it is larger than the sum of its proper divisors (108750105).

205416423 is a wasteful number, since it uses less digits than its factorization.

205416423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342614 (or 1342611 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 205416423 is about 14332.3558077519. The cubic root of 205416423 is about 590.0358333115.

The spelling of 205416423 in words is "two hundred five million, four hundred sixteen thousand, four hundred twenty-three".