10423821 has 4 divisors (see below), whose sum is σ = 13898432. Its totient is φ = 6949212.

The previous prime is 10423753. The next prime is 10423823. The reversal of 10423821 is 12832401.

10423821 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.

It is not a de Polignac number, because 10423821 - 2¹⁴ = 10407437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10423823) 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, 1737301 + ... + 1737306.

It is an arithmetic number, because the mean of its divisors is an integer number (3474608).

Almost surely, 2^10423821 is an apocalyptic number.

It is an amenable number.

10423821 is a deficient number, since it is larger than the sum of its proper divisors (3474611).

10423821 is an equidigital number, since it uses as much as digits as its factorization.

10423821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3474610.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 10423821 is about 3228.5942761518. The cubic root of 10423821 is about 218.4451038284.

The spelling of 10423821 in words is "ten million, four hundred twenty-three thousand, eight hundred twenty-one".