6392748021 has 16 divisors (see below), whose sum is σ = 9302914560. Its totient is φ = 3872571120.

The previous prime is 6392748013. The next prime is 6392748031. The reversal of 6392748021 is 1208472936.

It is not a de Polignac number, because 6392748021 - 2³ = 6392748013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6392748031) 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, 27456 + ... + 116358.

It is an arithmetic number, because the mean of its divisors is an integer number (581432160).

Almost surely, 2^6392748021 is an apocalyptic number.

It is an amenable number.

6392748021 is a deficient number, since it is larger than the sum of its proper divisors (2910166539).

6392748021 is a wasteful number, since it uses less digits than its factorization.

6392748021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91096.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 6392748021 is about 79954.6622843221. The cubic root of 6392748021 is about 1855.9340037232.

The spelling of 6392748021 in words is "six billion, three hundred ninety-two million, seven hundred forty-eight thousand, twenty-one".