20255516 has 6 divisors (see below), whose sum is σ = 35447160. Its totient is φ = 10127756.

The previous prime is 20255513. The next prime is 20255527. The reversal of 20255516 is 61555202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20255513) 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 as a sum of consecutive naturals, namely, 2531936 + ... + 2531943.

It is an arithmetic number, because the mean of its divisors is an integer number (5907860).

Almost surely, 2^20255516 is an apocalyptic number.

It is an amenable number.

20255516 is a deficient number, since it is larger than the sum of its proper divisors (15191644).

20255516 is a wasteful number, since it uses less digits than its factorization.

20255516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5063883 (or 5063881 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 20255516 is about 4500.6128471576. The cubic root of 20255516 is about 272.5928354118.

The spelling of 20255516 in words is "twenty million, two hundred fifty-five thousand, five hundred sixteen".