20620220 has 24 divisors (see below), whose sum is σ = 44311344. Its totient is φ = 8055936.

The previous prime is 20620219. The next prime is 20620231. The reversal of 20620220 is 2202602.

It is a junction number, because it is equal to n+sod(n) for n = 20620195 and 20620204.

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, 11129 + ... + 12848.

It is an arithmetic number, because the mean of its divisors is an integer number (1846306).

Almost surely, 2^20620220 is an apocalyptic number.

20620220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20620220 is an abundant number, since it is smaller than the sum of its proper divisors (23691124).

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

20620220 is a wasteful number, since it uses less digits than its factorization.

20620220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24029 (or 24027 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20620220 is about 4540.9492399717. The cubic root of 20620220 is about 274.2191402269.

Adding to 20620220 its reverse (2202602), we get a palindrome (22822822).

The spelling of 20620220 in words is "twenty million, six hundred twenty thousand, two hundred twenty".