21880583 has 2 divisors, whose sum is σ = 21880584. Its totient is φ = 21880582.

The previous prime is 21880559. The next prime is 21880589. The reversal of 21880583 is 38508812.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21880583 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21880589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10940291 + 10940292.

It is an arithmetic number, because the mean of its divisors is an integer number (10940292).

Almost surely, 2^21880583 is an apocalyptic number.

21880583 is a deficient number, since it is larger than the sum of its proper divisors (1).

21880583 is an equidigital number, since it uses as much as digits as its factorization.

21880583 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 21880583 is about 4677.6685431954. The cubic root of 21880583 is about 279.6960264121.

The spelling of 21880583 in words is "twenty-one million, eight hundred eighty thousand, five hundred eighty-three".