20965812 has 24 divisors (see below), whose sum is σ = 55909056. Its totient is φ = 5990208.

The previous prime is 20965757. The next prime is 20965817. The reversal of 20965812 is 21856902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20965817) 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, 124713 + ... + 124880.

It is an arithmetic number, because the mean of its divisors is an integer number (2329544).

Almost surely, 2^20965812 is an apocalyptic number.

It is an amenable number.

20965812 is an abundant number, since it is smaller than the sum of its proper divisors (34943244).

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

20965812 is a wasteful number, since it uses less digits than its factorization.

20965812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249607 (or 249605 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 20965812 is about 4578.8439589049. The cubic root of 20965812 is about 275.7426186991.

The spelling of 20965812 in words is "twenty million, nine hundred sixty-five thousand, eight hundred twelve".