2021071700 has 18 divisors (see below), whose sum is σ = 4385725806. Its totient is φ = 808428640.

The previous prime is 2021071699. The next prime is 2021071721. The reversal of 2021071700 is 71701202.

It can be written as a sum of positive squares in 3 ways, for example, as 12418576 + 2008653124 = 3524^2 + 44818^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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 5 ways as a sum of consecutive naturals, for example, 10105259 + ... + 10105458.

Almost surely, 2^2021071700 is an apocalyptic number.

2021071700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021071700 is an abundant number, since it is smaller than the sum of its proper divisors (2364654106).

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

2021071700 is a wasteful number, since it uses less digits than its factorization.

2021071700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20210731 (or 20210724 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 2021071700 is about 44956.3310335708. The cubic root of 2021071700 is about 1264.3303803441.

Adding to 2021071700 its reverse (71701202), we get a palindrome (2092772902).

The spelling of 2021071700 in words is "two billion, twenty-one million, seventy-one thousand, seven hundred".