2321744921 has 4 divisors (see below), whose sum is σ = 2323934244. Its totient is φ = 2319555600.

The previous prime is 2321744911. The next prime is 2321744951. The reversal of 2321744921 is 1294471232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1464133696 + 857611225 = 38264^2 + 29285^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321744921 - 2¹⁸ = 2321482777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2321744911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1093070 + ... + 1095191.

It is an arithmetic number, because the mean of its divisors is an integer number (580983561).

Almost surely, 2^2321744921 is an apocalyptic number.

It is an amenable number.

2321744921 is a deficient number, since it is larger than the sum of its proper divisors (2189323).

2321744921 is a wasteful number, since it uses less digits than its factorization.

2321744921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189322.

The product of its digits is 24192, while the sum is 35.

The square root of 2321744921 is about 48184.4883857866. The cubic root of 2321744921 is about 1324.1529977248.

The spelling of 2321744921 in words is "two billion, three hundred twenty-one million, seven hundred forty-four thousand, nine hundred twenty-one".