20260555 has 16 divisors (see below), whose sum is σ = 29249280. Its totient is φ = 13161312.

The previous prime is 20260553. The next prime is 20260567. The reversal of 20260555 is 55506202.

It is a cyclic number.

It is not a de Polignac number, because 20260555 - 2¹ = 20260553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20260553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14569 + ... + 15898.

It is an arithmetic number, because the mean of its divisors is an integer number (1828080).

Almost surely, 2^20260555 is an apocalyptic number.

20260555 is a deficient number, since it is larger than the sum of its proper divisors (8988725).

20260555 is a wasteful number, since it uses less digits than its factorization.

20260555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30498.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 20260555 is about 4501.1726249945. The cubic root of 20260555 is about 272.6154380025.

Adding to 20260555 its reverse (55506202), we get a palindrome (75766757).

The spelling of 20260555 in words is "twenty million, two hundred sixty thousand, five hundred fifty-five".