21703834 has 8 divisors (see below), whose sum is σ = 32771808. Its totient is φ = 10779900.

The previous prime is 21703831. The next prime is 21703853. The reversal of 21703834 is 43830712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21703831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35632 + ... + 36235.

It is an arithmetic number, because the mean of its divisors is an integer number (4096476).

Almost surely, 2^21703834 is an apocalyptic number.

21703834 is a deficient number, since it is larger than the sum of its proper divisors (11067974).

21703834 is a wasteful number, since it uses less digits than its factorization.

21703834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72020.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 21703834 is about 4658.7373825963. The cubic root of 21703834 is about 278.9408712370.

The spelling of 21703834 in words is "twenty-one million, seven hundred three thousand, eight hundred thirty-four".