20205364 has 6 divisors (see below), whose sum is σ = 35359394. Its totient is φ = 10102680.

The previous prime is 20205343. The next prime is 20205371. The reversal of 20205364 is 46350202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16564900 + 3640464 = 4070^2 + 1908^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2525667 + ... + 2525674.

Almost surely, 2^20205364 is an apocalyptic number.

It is an amenable number.

20205364 is a deficient number, since it is larger than the sum of its proper divisors (15154030).

20205364 is a wasteful number, since it uses less digits than its factorization.

20205364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5051345 (or 5051343 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 20205364 is about 4495.0377084069. The cubic root of 20205364 is about 272.3676724739.

Adding to 20205364 its reverse (46350202), we get a palindrome (66555566).

The spelling of 20205364 in words is "twenty million, two hundred five thousand, three hundred sixty-four".