21879083 has 2 divisors, whose sum is σ = 21879084. Its totient is φ = 21879082.

The previous prime is 21879047. The next prime is 21879097. The reversal of 21879083 is 38097812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21879083 - 2⁶ = 21879019 is a prime.

It is not a weakly prime, because it can be changed into another prime (21879043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10939541 + 10939542.

It is an arithmetic number, because the mean of its divisors is an integer number (10939542).

Almost surely, 2^21879083 is an apocalyptic number.

21879083 is a deficient number, since it is larger than the sum of its proper divisors (1).

21879083 is an equidigital number, since it uses as much as digits as its factorization.

21879083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 21879083 is about 4677.5082041617. The cubic root of 21879083 is about 279.6896348453.

The spelling of 21879083 in words is "twenty-one million, eight hundred seventy-nine thousand, eighty-three".