20356872 has 16 divisors (see below), whose sum is σ = 50892240. Its totient is φ = 6785616.

The previous prime is 20356841. The next prime is 20356873. The reversal of 20356872 is 27865302.

It is not an unprimeable number, because it can be changed into a prime (20356873) 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, 424078 + ... + 424125.

It is an arithmetic number, because the mean of its divisors is an integer number (3180765).

Almost surely, 2^20356872 is an apocalyptic number.

It is an amenable number.

20356872 is an abundant number, since it is smaller than the sum of its proper divisors (30535368).

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

20356872 is a wasteful number, since it uses less digits than its factorization.

20356872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848212 (or 848208 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 20356872 is about 4511.8590403513. The cubic root of 20356872 is about 273.0467523145.

It can be divided in two parts, 203 and 56872, that added together give a palindrome (57075).

The spelling of 20356872 in words is "twenty million, three hundred fifty-six thousand, eight hundred seventy-two".