20255290 has 32 divisors (see below), whose sum is σ = 40461120. Its totient is φ = 7238400.

The previous prime is 20255227. The next prime is 20255293. The reversal of 20255290 is 9255202.

It is not an unprimeable number, because it can be changed into a prime (20255293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4930 + ... + 8050.

It is an arithmetic number, because the mean of its divisors is an integer number (1264410).

Almost surely, 2^20255290 is an apocalyptic number.

20255290 is a deficient number, since it is larger than the sum of its proper divisors (20205830).

20255290 is a wasteful number, since it uses less digits than its factorization.

20255290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3198.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 20255290 is about 4500.5877393958. The cubic root of 20255290 is about 272.5918215940.

The spelling of 20255290 in words is "twenty million, two hundred fifty-five thousand, two hundred ninety".