21273883 has 2 divisors, whose sum is σ = 21273884. Its totient is φ = 21273882.

The previous prime is 21273869. The next prime is 21273893. The reversal of 21273883 is 38837212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21273883 - 2¹⁷ = 21142811 is a prime.

It is not a weakly prime, because it can be changed into another prime (21273803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10636941 + 10636942.

It is an arithmetic number, because the mean of its divisors is an integer number (10636942).

Almost surely, 2^21273883 is an apocalyptic number.

21273883 is a deficient number, since it is larger than the sum of its proper divisors (1).

21273883 is an equidigital number, since it uses as much as digits as its factorization.

21273883 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 21273883 is about 4612.3619762547. The cubic root of 21273883 is about 277.0866415620.

The spelling of 21273883 in words is "twenty-one million, two hundred seventy-three thousand, eight hundred eighty-three".