20552205 has 32 divisors (see below), whose sum is σ = 35568000. Its totient is φ = 10098432.

The previous prime is 20552177. The next prime is 20552249. The reversal of 20552205 is 50225502.

20552205 = 237² + 238² + ... + 421².

It is not a de Polignac number, because 20552205 - 2¹⁴ = 20535821 is a prime.

It is a super-3 number, since 3×20552205³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9571 + ... + 11519.

It is an arithmetic number, because the mean of its divisors is an integer number (1111500).

Almost surely, 2^20552205 is an apocalyptic number.

It is an amenable number.

20552205 is a deficient number, since it is larger than the sum of its proper divisors (15015795).

20552205 is a wasteful number, since it uses less digits than its factorization.

20552205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2013.

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 20552205 is about 4533.4539812377. The cubic root of 20552205 is about 273.9173077047.

Adding to 20552205 its reverse (50225502), we get a palindrome (70777707).

The spelling of 20552205 in words is "twenty million, five hundred fifty-two thousand, two hundred five".