2620123220 has 48 divisors (see below), whose sum is σ = 6464199168. Its totient is φ = 879480960.

The previous prime is 2620123183. The next prime is 2620123229. The reversal of 2620123220 is 223210262.

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 = 2620123192 and 2620123201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2620123229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455204 + ... + 460923.

It is an arithmetic number, because the mean of its divisors is an integer number (134670816).

Almost surely, 2^2620123220 is an apocalyptic number.

2620123220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2620123220 is an abundant number, since it is smaller than the sum of its proper divisors (3844075948).

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

2620123220 is a wasteful number, since it uses less digits than its factorization.

2620123220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916160 (or 916158 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2620123220 is about 51187.1392050777. The cubic root of 2620123220 is about 1378.6072940969.

Adding to 2620123220 its reverse (223210262), we get a palindrome (2843333482).

The spelling of 2620123220 in words is "two billion, six hundred twenty million, one hundred twenty-three thousand, two hundred twenty".