21934435 has 4 divisors (see below), whose sum is σ = 26321328. Its totient is φ = 17547544.

The previous prime is 21934427. The next prime is 21934447. The reversal of 21934435 is 53443912.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21934435 - 2³ = 21934427 is a prime.

It is a super-2 number, since 2×21934435² = 962238877538450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21934397 and 21934406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2193439 + ... + 2193448.

It is an arithmetic number, because the mean of its divisors is an integer number (6580332).

Almost surely, 2^21934435 is an apocalyptic number.

21934435 is a deficient number, since it is larger than the sum of its proper divisors (4386893).

21934435 is an equidigital number, since it uses as much as digits as its factorization.

21934435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4386892.

The product of its digits is 12960, while the sum is 31.

The square root of 21934435 is about 4683.4212921752. The cubic root of 21934435 is about 279.9252989499.

The spelling of 21934435 in words is "twenty-one million, nine hundred thirty-four thousand, four hundred thirty-five".