2146447021 has 4 divisors (see below), whose sum is σ = 2146553344. Its totient is φ = 2146340700.

The previous prime is 2146447001. The next prime is 2146447063. The reversal of 2146447021 is 1207446412.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2146447021 - 2⁹ = 2146446509 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 (2146447001) 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, 12525 + ... + 66706.

It is an arithmetic number, because the mean of its divisors is an integer number (536638336).

Almost surely, 2^2146447021 is an apocalyptic number.

It is an amenable number.

2146447021 is a deficient number, since it is larger than the sum of its proper divisors (106323).

2146447021 is an equidigital number, since it uses as much as digits as its factorization.

2146447021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106322.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 2146447021 is about 46329.7638780946. The cubic root of 2146447021 is about 1289.9515277342.

The spelling of 2146447021 in words is "two billion, one hundred forty-six million, four hundred forty-seven thousand, twenty-one".