20670056 has 32 divisors (see below), whose sum is σ = 43649280. Its totient is φ = 9091200.

The previous prime is 20670047. The next prime is 20670059. The reversal of 20670056 is 65007602.

It is not an unprimeable number, because it can be changed into a prime (20670059) 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, 1061 + ... + 6516.

It is an arithmetic number, because the mean of its divisors is an integer number (1364040).

Almost surely, 2^20670056 is an apocalyptic number.

It is an amenable number.

20670056 is an abundant number, since it is smaller than the sum of its proper divisors (22979224).

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

20670056 is a wasteful number, since it uses less digits than its factorization.

20670056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7625 (or 7621 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 20670056 is about 4546.4333273457. The cubic root of 20670056 is about 274.4398780962.

Adding to 20670056 its reverse (65007602), we get a palindrome (85677658).

It can be divided in two parts, 20 and 670056, that added together give a palindrome (670076).

The spelling of 20670056 in words is "twenty million, six hundred seventy thousand, fifty-six".