21894703 has 2 divisors, whose sum is σ = 21894704. Its totient is φ = 21894702.

The previous prime is 21894701. The next prime is 21894737. The reversal of 21894703 is 30749812.

It is an a-pointer prime, because the next prime (21894737) can be obtained adding 21894703 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21894703 - 2¹ = 21894701 is a prime.

Together with 21894701, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21894701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10947351 + 10947352.

It is an arithmetic number, because the mean of its divisors is an integer number (10947352).

Almost surely, 2^21894703 is an apocalyptic number.

21894703 is a deficient number, since it is larger than the sum of its proper divisors (1).

21894703 is an equidigital number, since it uses as much as digits as its factorization.

21894703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 21894703 is about 4679.1775986812. The cubic root of 21894703 is about 279.7561780494.

The spelling of 21894703 in words is "twenty-one million, eight hundred ninety-four thousand, seven hundred three".