10021670257 has 4 divisors (see below), whose sum is σ = 10254732400. Its totient is φ = 9788608116.

The previous prime is 10021670237. The next prime is 10021670279. The reversal of 10021670257 is 75207612001.

10021670257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75207612001 = 5981 ⋅12574421.

It is a cyclic number.

It is not a de Polignac number, because 10021670257 - 2¹⁵ = 10021637489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10021670237) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 116531007 + ... + 116531092.

It is an arithmetic number, because the mean of its divisors is an integer number (2563683100).

Almost surely, 2^10021670257 is an apocalyptic number.

It is an amenable number.

10021670257 is a deficient number, since it is larger than the sum of its proper divisors (233062143).

10021670257 is an equidigital number, since it uses as much as digits as its factorization.

10021670257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233062142.

The product of its (nonzero) digits is 5880, while the sum is 31.

The spelling of 10021670257 in words is "ten billion, twenty-one million, six hundred seventy thousand, two hundred fifty-seven".