20072820 has 24 divisors (see below), whose sum is σ = 56204064. Its totient is φ = 5352736.

The previous prime is 20072809. The next prime is 20072827. The reversal of 20072820 is 2827002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20072827) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 167214 + ... + 167333.

It is an arithmetic number, because the mean of its divisors is an integer number (2341836).

Almost surely, 2^20072820 is an apocalyptic number.

20072820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20072820 is an abundant number, since it is smaller than the sum of its proper divisors (36131244).

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

20072820 is a wasteful number, since it uses less digits than its factorization.

20072820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334559 (or 334557 counting only the distinct ones).

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

The square root of 20072820 is about 4480.2700811447. The cubic root of 20072820 is about 271.7708024542.

Adding to 20072820 its reverse (2827002), we get a palindrome (22899822).

The spelling of 20072820 in words is "twenty million, seventy-two thousand, eight hundred twenty".