20683812 has 12 divisors (see below), whose sum is σ = 48262256. Its totient is φ = 6894600.

The previous prime is 20683811. The next prime is 20683813. The reversal of 20683812 is 21838602.

It is an interprime number because it is at equal distance from previous prime (20683811) and next prime (20683813).

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

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20683812.

It is not an unprimeable number, because it can be changed into a prime (20683811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 861814 + ... + 861837.

Almost surely, 2^20683812 is an apocalyptic number.

It is an amenable number.

20683812 is an abundant number, since it is smaller than the sum of its proper divisors (27578444).

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

20683812 is a wasteful number, since it uses less digits than its factorization.

20683812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723658 (or 1723656 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 20683812 is about 4547.9459099686. The cubic root of 20683812 is about 274.5007448528.

The spelling of 20683812 in words is "twenty million, six hundred eighty-three thousand, eight hundred twelve".