20565246 has 16 divisors (see below), whose sum is σ = 44294544. Its totient is φ = 6327744.

The previous prime is 20565211. The next prime is 20565247. The reversal of 20565246 is 64256502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20565247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131751 + ... + 131906.

It is an arithmetic number, because the mean of its divisors is an integer number (2768409).

Almost surely, 2^20565246 is an apocalyptic number.

20565246 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20565246 is an abundant number, since it is smaller than the sum of its proper divisors (23729298).

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

20565246 is a wasteful number, since it uses less digits than its factorization.

20565246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263675.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 20565246 is about 4534.8920604574. The cubic root of 20565246 is about 273.9752317463.

The spelling of 20565246 in words is "twenty million, five hundred sixty-five thousand, two hundred forty-six".