21834964 has 12 divisors (see below), whose sum is σ = 38258388. Its totient is φ = 10904000.

The previous prime is 21834961. The next prime is 21834997. The reversal of 21834964 is 46943812.

It can be written as a sum of positive squares in 2 ways, for example, as 18558864 + 3276100 = 4308^2 + 1810^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21834961) 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, 864 + ... + 6664.

It is an arithmetic number, because the mean of its divisors is an integer number (3188199).

Almost surely, 2^21834964 is an apocalyptic number.

It is an amenable number.

21834964 is a deficient number, since it is larger than the sum of its proper divisors (16423424).

21834964 is a wasteful number, since it uses less digits than its factorization.

21834964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6746 (or 6744 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 21834964 is about 4672.7897448954. The cubic root of 21834964 is about 279.5015110170.

The spelling of 21834964 in words is "twenty-one million, eight hundred thirty-four thousand, nine hundred sixty-four".