21496634 has 8 divisors (see below), whose sum is σ = 32431860. Its totient is φ = 10686016.

The previous prime is 21496613. The next prime is 21496637. The reversal of 21496634 is 43669412.

It can be written as a sum of positive squares in 2 ways, for example, as 15960025 + 5536609 = 3995^2 + 2353^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21496594 and 21496603.

It is not an unprimeable number, because it can be changed into a prime (21496637) 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, 30719 + ... + 31410.

Almost surely, 2^21496634 is an apocalyptic number.

21496634 is a deficient number, since it is larger than the sum of its proper divisors (10935226).

21496634 is a wasteful number, since it uses less digits than its factorization.

21496634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62304.

The product of its digits is 31104, while the sum is 35.

The square root of 21496634 is about 4636.4462684259. The cubic root of 21496634 is about 278.0503764615.

The spelling of 21496634 in words is "twenty-one million, four hundred ninety-six thousand, six hundred thirty-four".