20060720 has 40 divisors (see below), whose sum is σ = 48151680. Its totient is φ = 7764480.

The previous prime is 20060717. The next prime is 20060737. The reversal of 20060720 is 2706002.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 1565 + ... + 6524.

It is an arithmetic number, because the mean of its divisors is an integer number (1203792).

Almost surely, 2^20060720 is an apocalyptic number.

20060720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20060720 is an abundant number, since it is smaller than the sum of its proper divisors (28090960).

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

20060720 is a wasteful number, since it uses less digits than its factorization.

20060720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8133 (or 8127 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 20060720 is about 4478.9195125610. The cubic root of 20060720 is about 271.7161831948.

Adding to 20060720 its reverse (2706002), we get a palindrome (22766722).

The spelling of 20060720 in words is "twenty million, sixty thousand, seven hundred twenty".