21344933 has 2 divisors, whose sum is σ = 21344934. Its totient is φ = 21344932.

The previous prime is 21344929. The next prime is 21344951. The reversal of 21344933 is 33944312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18515809 + 2829124 = 4303^2 + 1682^2 .

It is a cyclic number.

It is not a de Polignac number, because 21344933 - 2² = 21344929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21344896 and 21344905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21344903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10672466 + 10672467.

It is an arithmetic number, because the mean of its divisors is an integer number (10672467).

Almost surely, 2^21344933 is an apocalyptic number.

It is an amenable number.

21344933 is a deficient number, since it is larger than the sum of its proper divisors (1).

21344933 is an equidigital number, since it uses as much as digits as its factorization.

21344933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 29.

The square root of 21344933 is about 4620.0576836226. The cubic root of 21344933 is about 277.3947678802.

The spelling of 21344933 in words is "twenty-one million, three hundred forty-four thousand, nine hundred thirty-three".