20266812 has 18 divisors (see below), whose sum is σ = 51230088. Its totient is φ = 6755592.

The previous prime is 20266793. The next prime is 20266837. The reversal of 20266812 is 21866202.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 281448 + ... + 281519.

It is an arithmetic number, because the mean of its divisors is an integer number (2846116).

Almost surely, 2^20266812 is an apocalyptic number.

It is an amenable number.

20266812 is an abundant number, since it is smaller than the sum of its proper divisors (30963276).

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

20266812 is a wasteful number, since it uses less digits than its factorization.

20266812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562977 (or 562972 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 20266812 is about 4501.8676124471. The cubic root of 20266812 is about 272.6434987545.

The spelling of 20266812 in words is "twenty million, two hundred sixty-six thousand, eight hundred twelve".