21434794 has 8 divisors (see below), whose sum is σ = 32229828. Its totient is φ = 10691520.

The previous prime is 21434789. The next prime is 21434797. The reversal of 21434794 is 49743412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13053769 + 8381025 = 3613^2 + 2895^2 .

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 (21434797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11887 + ... + 13570.

Almost surely, 2^21434794 is an apocalyptic number.

21434794 is a deficient number, since it is larger than the sum of its proper divisors (10795034).

21434794 is a wasteful number, since it uses less digits than its factorization.

21434794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25880.

The product of its digits is 24192, while the sum is 34.

The square root of 21434794 is about 4629.7725646083. The cubic root of 21434794 is about 277.7834951475.

The spelling of 21434794 in words is "twenty-one million, four hundred thirty-four thousand, seven hundred ninety-four".