21848023 has 2 divisors, whose sum is σ = 21848024. Its totient is φ = 21848022.

The previous prime is 21847993. The next prime is 21848041. The reversal of 21848023 is 32084812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21848023 - 2¹⁷ = 21716951 is a prime.

It is a super-2 number, since 2×21848023² = 954672218017058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21847982 and 21848000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21848053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10924011 + 10924012.

It is an arithmetic number, because the mean of its divisors is an integer number (10924012).

Almost surely, 2^21848023 is an apocalyptic number.

21848023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21848023 is an equidigital number, since it uses as much as digits as its factorization.

21848023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 21848023 is about 4674.1868811591. The cubic root of 21848023 is about 279.5572210976.

The spelling of 21848023 in words is "twenty-one million, eight hundred forty-eight thousand, twenty-three".