21335834 has 8 divisors (see below), whose sum is σ = 34465620. Its totient is φ = 9847296.

The previous prime is 21335827. The next prime is 21335849. The reversal of 21335834 is 43853312.

It can be written as a sum of positive squares in 2 ways, for example, as 21187609 + 148225 = 4603^2 + 385^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21335797 and 21335806.

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, 410279 + ... + 410330.

Almost surely, 2^21335834 is an apocalyptic number.

21335834 is a deficient number, since it is larger than the sum of its proper divisors (13129786).

21335834 is a wasteful number, since it uses less digits than its factorization.

21335834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820624.

The product of its digits is 8640, while the sum is 29.

The square root of 21335834 is about 4619.0728506920. The cubic root of 21335834 is about 277.3553459758.

The spelling of 21335834 in words is "twenty-one million, three hundred thirty-five thousand, eight hundred thirty-four".