2171727020 has 24 divisors (see below), whose sum is σ = 4566683184. Its totient is φ = 867537216.

The previous prime is 2171727017. The next prime is 2171727023. The reversal of 2171727020 is 207271712.

It is an interprime number because it is at equal distance from previous prime (2171727017) and next prime (2171727023).

It is not an unprimeable number, because it can be changed into a prime (2171727023) 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, 56582 + ... + 86861.

It is an arithmetic number, because the mean of its divisors is an integer number (190278466).

Almost surely, 2^2171727020 is an apocalyptic number.

2171727020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2171727020 is an abundant number, since it is smaller than the sum of its proper divisors (2394956164).

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

2171727020 is a wasteful number, since it uses less digits than its factorization.

2171727020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144209 (or 144207 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 29.

The square root of 2171727020 is about 46601.7920256292. The cubic root of 2171727020 is about 1294.9959541323.

Adding to 2171727020 its reverse (207271712), we get a palindrome (2378998732).

The spelling of 2171727020 in words is "two billion, one hundred seventy-one million, seven hundred twenty-seven thousand, twenty".