2006631220 has 96 divisors (see below), whose sum is σ = 4774049280. Its totient is φ = 701783040.

The previous prime is 2006631197. The next prime is 2006631257. The reversal of 2006631220 is 221366002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 2006631191 and 2006631200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2341032 + ... + 2341888.

It is an arithmetic number, because the mean of its divisors is an integer number (49729680).

Almost surely, 2^2006631220 is an apocalyptic number.

2006631220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2006631220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2387024640).

2006631220 is an abundant number, since it is smaller than the sum of its proper divisors (2767418060).

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

2006631220 is a wasteful number, since it uses less digits than its factorization.

2006631220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273 (or 1271 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 2006631220 is about 44795.4374908874. The cubic root of 2006631220 is about 1261.3119827062.

Adding to 2006631220 its reverse (221366002), we get a palindrome (2227997222).

The spelling of 2006631220 in words is "two billion, six million, six hundred thirty-one thousand, two hundred twenty".