20255136 has 48 divisors (see below), whose sum is σ = 58006368. Its totient is φ = 6137600.

The previous prime is 20255117. The next prime is 20255153. The reversal of 20255136 is 63155202.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8535 + ... + 10646.

It is an arithmetic number, because the mean of its divisors is an integer number (1208466).

Almost surely, 2^20255136 is an apocalyptic number.

It is an amenable number.

20255136 is an abundant number, since it is smaller than the sum of its proper divisors (37751232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20255136 is a wasteful number, since it uses less digits than its factorization.

20255136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19205 (or 19197 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 20255136 is about 4500.5706304868. The cubic root of 20255136 is about 272.5911307580.

The spelling of 20255136 in words is "twenty million, two hundred fifty-five thousand, one hundred thirty-six".