20052720 has 60 divisors (see below), whose sum is σ = 67346136. Its totient is φ = 5347200.

The previous prime is 20052719. The next prime is 20052751. The reversal of 20052720 is 2725002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×20052720² = 804223158796800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20052693 and 20052702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13206 + ... + 14645.

Almost surely, 2^20052720 is an apocalyptic number.

20052720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20052720 is an abundant number, since it is smaller than the sum of its proper divisors (47293416).

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

20052720 is a wasteful number, since it uses less digits than its factorization.

20052720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27870 (or 27861 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 20052720 is about 4478.0263509720. The cubic root of 20052720 is about 271.6800592258.

Adding to 20052720 its reverse (2725002), we get a palindrome (22777722).

The spelling of 20052720 in words is "twenty million, fifty-two thousand, seven hundred twenty".