10670821 has 4 divisors (see below), whose sum is σ = 12195232. Its totient is φ = 9146412.

The previous prime is 10670809. The next prime is 10670839. The reversal of 10670821 is 12807601.

10670821 is digitally balanced in base 2 and base 3, because in such bases 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.

It is a cyclic number.

It is not a de Polignac number, because 10670821 - 2¹⁹ = 10146533 is a prime.

It is a super-2 number, since 2×10670821² = 227732841628082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10670801) 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, 762195 + ... + 762208.

It is an arithmetic number, because the mean of its divisors is an integer number (3048808).

Almost surely, 2^10670821 is an apocalyptic number.

It is an amenable number.

10670821 is a deficient number, since it is larger than the sum of its proper divisors (1524411).

10670821 is an equidigital number, since it uses as much as digits as its factorization.

10670821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524410.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 10670821 is about 3266.6222616030. The cubic root of 10670821 is about 220.1570572721.

The spelling of 10670821 in words is "ten million, six hundred seventy thousand, eight hundred twenty-one".