20208072 has 16 divisors (see below), whose sum is σ = 50520240. Its totient is φ = 6736016.

The previous prime is 20208061. The next prime is 20208101. The reversal of 20208072 is 27080202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420978 + ... + 421025.

It is an arithmetic number, because the mean of its divisors is an integer number (3157515).

Almost surely, 2^20208072 is an apocalyptic number.

It is an amenable number.

20208072 is an abundant number, since it is smaller than the sum of its proper divisors (30312168).

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

20208072 is a wasteful number, since it uses less digits than its factorization.

20208072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842012 (or 842008 counting only the distinct ones).

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

The square root of 20208072 is about 4495.3389193697. The cubic root of 20208072 is about 272.3798398487.

Adding to 20208072 its reverse (27080202), we get a palindrome (47288274).

The spelling of 20208072 in words is "twenty million, two hundred eight thousand, seventy-two".