6821742130 has 32 divisors (see below), whose sum is σ = 14036270976. Its totient is φ = 2338387584.

The previous prime is 6821742127. The next prime is 6821742131. The reversal of 6821742130 is 312471286.

It is not an unprimeable number, because it can be changed into a prime (6821742131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 504822 + ... + 518158.

It is an arithmetic number, because the mean of its divisors is an integer number (438633468).

Almost surely, 2^6821742130 is an apocalyptic number.

6821742130 is an abundant number, since it is smaller than the sum of its proper divisors (7214528846).

6821742130 is a wasteful number, since it uses less digits than its factorization.

6821742130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20658.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 6821742130 is about 82593.8383295025. The cubic root of 6821742130 is about 1896.5535054930.

The spelling of 6821742130 in words is "six billion, eight hundred twenty-one million, seven hundred forty-two thousand, one hundred thirty".