2186722020 has 144 divisors (see below), whose sum is σ = 7352529408. Its totient is φ = 483678720.

The previous prime is 2186721991. The next prime is 2186722037. The reversal of 2186722020 is 202276812.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79144 + ... + 103136.

It is an arithmetic number, because the mean of its divisors is an integer number (51059232).

Almost surely, 2^2186722020 is an apocalyptic number.

2186722020 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 2186722020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3676264704).

2186722020 is an abundant number, since it is smaller than the sum of its proper divisors (5165807388).

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

2186722020 is a wasteful number, since it uses less digits than its factorization.

2186722020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24050 (or 24041 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 2186722020 is about 46762.3996390262. The cubic root of 2186722020 is about 1297.9696155369.

Adding to 2186722020 its reverse (202276812), we get a palindrome (2388998832).

It can be divided in two parts, 2186 and 722020, that added together give a triangular number (724206 = T₁₂₀₃).

The spelling of 2186722020 in words is "two billion, one hundred eighty-six million, seven hundred twenty-two thousand, twenty".