20265636 has 12 divisors (see below), whose sum is σ = 47286512. Its totient is φ = 6755208.

The previous prime is 20265629. The next prime is 20265667. The reversal of 20265636 is 63656202.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 844390 + ... + 844413.

Almost surely, 2^20265636 is an apocalyptic number.

It is an amenable number.

20265636 is an abundant number, since it is smaller than the sum of its proper divisors (27020876).

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

20265636 is a wasteful number, since it uses less digits than its factorization.

20265636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688810 (or 1688808 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 20265636 is about 4501.7369980931. The cubic root of 20265636 is about 272.6382251911.

The spelling of 20265636 in words is "twenty million, two hundred sixty-five thousand, six hundred thirty-six".