205421360 has 20 divisors (see below), whose sum is σ = 477604848. Its totient is φ = 82168512.

The previous prime is 205421351. The next prime is 205421399. The reversal of 205421360 is 63124502.

It is a tau number, because it is divible by the number of its divisors (20).

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, 1283804 + ... + 1283963.

Almost surely, 2^205421360 is an apocalyptic number.

205421360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205421360 is an abundant number, since it is smaller than the sum of its proper divisors (272183488).

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

205421360 is a wasteful number, since it uses less digits than its factorization.

205421360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2567780 (or 2567774 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 205421360 is about 14332.5280393935. The cubic root of 205421360 is about 590.0405602682.

Adding to 205421360 its reverse (63124502), we get a palindrome (268545862).

The spelling of 205421360 in words is "two hundred five million, four hundred twenty-one thousand, three hundred sixty".