21734703 has 8 divisors (see below), whose sum is σ = 32199600. Its totient is φ = 14489784.

The previous prime is 21734681. The next prime is 21734707. The reversal of 21734703 is 30743712.

It is not a de Polignac number, because 21734703 - 2⁹ = 21734191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 804989 = 21734703 / (2 + 1 + 7 + 3 + 4 + 7 + 0 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21734707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402468 + ... + 402521.

It is an arithmetic number, because the mean of its divisors is an integer number (4024950).

Almost surely, 2^21734703 is an apocalyptic number.

21734703 is a deficient number, since it is larger than the sum of its proper divisors (10464897).

21734703 is an equidigital number, since it uses as much as digits as its factorization.

21734703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804998 (or 804992 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 21734703 is about 4662.0492275393. The cubic root of 21734703 is about 279.0730529017.

Subtracting 21734703 from its reverse (30743712), we obtain a palindrome (9009009).

The spelling of 21734703 in words is "twenty-one million, seven hundred thirty-four thousand, seven hundred three".