21814733 has 2 divisors, whose sum is σ = 21814734. Its totient is φ = 21814732.

The previous prime is 21814711. The next prime is 21814739. The reversal of 21814733 is 33741812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15194404 + 6620329 = 3898^2 + 2573^2 .

It is a cyclic number.

It is not a de Polignac number, because 21814733 - 2¹⁰ = 21813709 is a prime.

It is a super-2 number, since 2×21814733² = 951765151722578, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21814696 and 21814705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21814739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10907366 + 10907367.

It is an arithmetic number, because the mean of its divisors is an integer number (10907367).

Almost surely, 2^21814733 is an apocalyptic number.

It is an amenable number.

21814733 is a deficient number, since it is larger than the sum of its proper divisors (1).

21814733 is an equidigital number, since it uses as much as digits as its factorization.

21814733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 21814733 is about 4670.6244764485. The cubic root of 21814733 is about 279.4151610941.

The spelling of 21814733 in words is "twenty-one million, eight hundred fourteen thousand, seven hundred thirty-three".