20935812 has 24 divisors (see below), whose sum is σ = 49000000. Its totient is φ = 6957216.

The previous prime is 20935799. The next prime is 20935813. The reversal of 20935812 is 21853902.

It is a happy number.

It is a super-3 number, since 3×20935812³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20935812.

It is not an unprimeable number, because it can be changed into a prime (20935813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1689 + ... + 6687.

Almost surely, 2^20935812 is an apocalyptic number.

It is an amenable number.

20935812 is an abundant number, since it is smaller than the sum of its proper divisors (28064188).

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

20935812 is a wasteful number, since it uses less digits than its factorization.

20935812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5355 (or 5353 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 20935812 is about 4575.5668501291. The cubic root of 20935812 is about 275.6110357948.

The spelling of 20935812 in words is "twenty million, nine hundred thirty-five thousand, eight hundred twelve".