20020872 has 32 divisors (see below), whose sum is σ = 51120000. Its totient is φ = 6531264.

The previous prime is 20020841. The next prime is 20020901. The reversal of 20020872 is 27802002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7747 + ... + 10002.

It is an arithmetic number, because the mean of its divisors is an integer number (1597500).

Almost surely, 2^20020872 is an apocalyptic number.

It is an amenable number.

20020872 is an abundant number, since it is smaller than the sum of its proper divisors (31099128).

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

20020872 is a wasteful number, since it uses less digits than its factorization.

20020872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17805 (or 17801 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 20020872 is about 4474.4689070324. The cubic root of 20020872 is about 271.5361543718.

Adding to 20020872 its reverse (27802002), we get a palindrome (47822874).

The spelling of 20020872 in words is "twenty million, twenty thousand, eight hundred seventy-two".