20620860 has 48 divisors (see below), whose sum is σ = 62182176. Its totient is φ = 5075712.

The previous prime is 20620849. The next prime is 20620861. The reversal of 20620860 is 6802602.

It is a self number, because there is not a number n which added to its sum of digits gives 20620860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12439 + ... + 13998.

It is an arithmetic number, because the mean of its divisors is an integer number (1295462).

Almost surely, 2^20620860 is an apocalyptic number.

20620860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20620860 is an abundant number, since it is smaller than the sum of its proper divisors (41561316).

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

20620860 is a wasteful number, since it uses less digits than its factorization.

20620860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26462 (or 26460 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20620860 is about 4541.0197092724. The cubic root of 20620860 is about 274.2219772228.

The spelling of 20620860 in words is "twenty million, six hundred twenty thousand, eight hundred sixty".