21476263 has 2 divisors, whose sum is σ = 21476264. Its totient is φ = 21476262.

The previous prime is 21476261. The next prime is 21476281. The reversal of 21476263 is 36267412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21476263 - 2¹ = 21476261 is a prime.

It is a super-2 number, since 2×21476263² = 922459744890338, which contains 22 as substring.

Together with 21476261, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21476261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10738131 + 10738132.

It is an arithmetic number, because the mean of its divisors is an integer number (10738132).

Almost surely, 2^21476263 is an apocalyptic number.

21476263 is a deficient number, since it is larger than the sum of its proper divisors (1).

21476263 is an equidigital number, since it uses as much as digits as its factorization.

21476263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 31.

The square root of 21476263 is about 4634.2489143334. The cubic root of 21476263 is about 277.9625184531.

The spelling of 21476263 in words is "twenty-one million, four hundred seventy-six thousand, two hundred sixty-three".