21914903 has 2 divisors, whose sum is σ = 21914904. Its totient is φ = 21914902.

The previous prime is 21914891. The next prime is 21914927. The reversal of 21914903 is 30941912.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21914903 - 2⁶ = 21914839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21914933) 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, 10957451 + 10957452.

It is an arithmetic number, because the mean of its divisors is an integer number (10957452).

Almost surely, 2^21914903 is an apocalyptic number.

21914903 is a deficient number, since it is larger than the sum of its proper divisors (1).

21914903 is an equidigital number, since it uses as much as digits as its factorization.

21914903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 21914903 is about 4681.3356000184. The cubic root of 21914903 is about 279.8421857289.

The spelling of 21914903 in words is "twenty-one million, nine hundred fourteen thousand, nine hundred three".