20071872 has 42 divisors (see below), whose sum is σ = 57534048. Its totient is φ = 6690432.

The previous prime is 20071829. The next prime is 20071873. The reversal of 20071872 is 27817002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20071873) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16848 + ... + 17999.

Almost surely, 2^20071872 is an apocalyptic number.

It is an amenable number.

20071872 is an abundant number, since it is smaller than the sum of its proper divisors (37462176).

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

20071872 is a wasteful number, since it uses less digits than its factorization.

20071872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34865 (or 34852 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 20071872 is about 4480.1642827021. The cubic root of 20071872 is about 271.7665239859.

Adding to 20071872 its reverse (27817002), we get a palindrome (47888874).

The spelling of 20071872 in words is "twenty million, seventy-one thousand, eight hundred seventy-two".