21430703 has 16 divisors (see below), whose sum is σ = 25712640. Its totient is φ = 17474400.

The previous prime is 21430697. The next prime is 21430723. The reversal of 21430703 is 30703412.

It is a cyclic number.

It is not a de Polignac number, because 21430703 - 2⁶ = 21430639 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21430723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12428 + ... + 14046.

It is an arithmetic number, because the mean of its divisors is an integer number (1607040).

Almost surely, 2^21430703 is an apocalyptic number.

21430703 is a deficient number, since it is larger than the sum of its proper divisors (4281937).

21430703 is a wasteful number, since it uses less digits than its factorization.

21430703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 21430703 is about 4629.3307291659. The cubic root of 21430703 is about 277.7658216306.

The spelling of 21430703 in words is "twenty-one million, four hundred thirty thousand, seven hundred three".