21034934 has 8 divisors (see below), whose sum is σ = 31615920. Its totient is φ = 10496296.

The previous prime is 21034891. The next prime is 21034943. The reversal of 21034934 is 43943012.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9314 + ... + 11349.

It is an arithmetic number, because the mean of its divisors is an integer number (3951990).

Almost surely, 2^21034934 is an apocalyptic number.

21034934 is a deficient number, since it is larger than the sum of its proper divisors (10580986).

21034934 is a wasteful number, since it uses less digits than its factorization.

21034934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21174.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 21034934 is about 4586.3857229849. The cubic root of 21034934 is about 276.0453174205.

Adding to 21034934 its reverse (43943012), we get a palindrome (64977946).

The spelling of 21034934 in words is "twenty-one million, thirty-four thousand, nine hundred thirty-four".