2185022020 has 24 divisors (see below), whose sum is σ = 4700463768. Its totient is φ = 852691200.

The previous prime is 2185022003. The next prime is 2185022027. The reversal of 2185022020 is 202205812.

It can be written as a sum of positive squares in 4 ways, for example, as 12716356 + 2172305664 = 3566^2 + 46608^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2185021982 and 2185022000.

It is not an unprimeable number, because it can be changed into a prime (2185022027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1331511 + ... + 1333150.

It is an arithmetic number, because the mean of its divisors is an integer number (195852657).

Almost surely, 2^2185022020 is an apocalyptic number.

2185022020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2185022020 is an abundant number, since it is smaller than the sum of its proper divisors (2515441748).

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

2185022020 is a wasteful number, since it uses less digits than its factorization.

2185022020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664711 (or 2664709 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 2185022020 is about 46744.2191078212. The cubic root of 2185022020 is about 1297.6331727734.

Adding to 2185022020 its reverse (202205812), we get a palindrome (2387227832).

The spelling of 2185022020 in words is "two billion, one hundred eighty-five million, twenty-two thousand, twenty".