6320140021 has 4 divisors (see below), whose sum is σ = 6806304652. Its totient is φ = 5833975392.

The previous prime is 6320140019. The next prime is 6320140039. The reversal of 6320140021 is 1200410236.

6320140021 = 56214² + 56215².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3160126225 + 3160013796 = 56215^2 + 56214^2 .

It is a cyclic number.

It is not a de Polignac number, because 6320140021 - 2¹ = 6320140019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6320140621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243082296 + ... + 243082321.

It is an arithmetic number, because the mean of its divisors is an integer number (1701576163).

Almost surely, 2^6320140021 is an apocalyptic number.

6320140021 is the 56215-th centered square number.

It is an amenable number.

6320140021 is a deficient number, since it is larger than the sum of its proper divisors (486164631).

6320140021 is a wasteful number, since it uses less digits than its factorization.

6320140021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486164630.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 6320140021 is about 79499.3083051670. The cubic root of 6320140021 is about 1848.8807469945.

Adding to 6320140021 its reverse (1200410236), we get a palindrome (7520550257).

The spelling of 6320140021 in words is "six billion, three hundred twenty million, one hundred forty thousand, twenty-one".