20867412 has 12 divisors (see below), whose sum is σ = 48690656. Its totient is φ = 6955800.

The previous prime is 20867411. The next prime is 20867419. The reversal of 20867412 is 21476802.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20867412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20867411) 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 3 ways as a sum of consecutive naturals, for example, 869464 + ... + 869487.

Almost surely, 2^20867412 is an apocalyptic number.

It is an amenable number.

20867412 is an abundant number, since it is smaller than the sum of its proper divisors (27823244).

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

20867412 is a wasteful number, since it uses less digits than its factorization.

20867412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738958 (or 1738956 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 20867412 is about 4568.0862513749. The cubic root of 20867412 is about 275.3105560457.

The spelling of 20867412 in words is "twenty million, eight hundred sixty-seven thousand, four hundred twelve".