20708120 has 32 divisors (see below), whose sum is σ = 46735920. Its totient is φ = 8257920.

The previous prime is 20708101. The next prime is 20708137. The reversal of 20708120 is 2180702.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20708092 and 20708101.

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, 17879 + ... + 19001.

Almost surely, 2^20708120 is an apocalyptic number.

20708120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20708120 is an abundant number, since it is smaller than the sum of its proper divisors (26027800).

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

20708120 is a wasteful number, since it uses less digits than its factorization.

20708120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595 (or 1591 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 20708120 is about 4550.6175405103. The cubic root of 20708120 is about 274.6082355466.

Adding to 20708120 its reverse (2180702), we get a palindrome (22888822).

The spelling of 20708120 in words is "twenty million, seven hundred eight thousand, one hundred twenty".