21495703 has 2 divisors, whose sum is σ = 21495704. Its totient is φ = 21495702.

The previous prime is 21495673. The next prime is 21495709. The reversal of 21495703 is 30759412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21495703 - 2⁵ = 21495671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21495709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10747851 + 10747852.

It is an arithmetic number, because the mean of its divisors is an integer number (10747852).

Almost surely, 2^21495703 is an apocalyptic number.

21495703 is a deficient number, since it is larger than the sum of its proper divisors (1).

21495703 is an equidigital number, since it uses as much as digits as its factorization.

21495703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 21495703 is about 4636.3458671674. The cubic root of 21495703 is about 278.0463623658.

The spelling of 21495703 in words is "twenty-one million, four hundred ninety-five thousand, seven hundred three".