21935234 has 16 divisors (see below), whose sum is σ = 35206080. Its totient is φ = 10218960.

The previous prime is 21935233. The next prime is 21935239. The reversal of 21935234 is 43253912.

It is a junction number, because it is equal to n+sod(n) for n = 21935197 and 21935206.

It is not an unprimeable number, because it can be changed into a prime (21935233) 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 7 ways as a sum of consecutive naturals, for example, 2414 + ... + 7049.

It is an arithmetic number, because the mean of its divisors is an integer number (2200380).

Almost surely, 2^21935234 is an apocalyptic number.

21935234 is a deficient number, since it is larger than the sum of its proper divisors (13270846).

21935234 is a wasteful number, since it uses less digits than its factorization.

21935234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9545.

The product of its digits is 6480, while the sum is 29.

The square root of 21935234 is about 4683.5065922874. The cubic root of 21935234 is about 279.9286978308.

It can be divided in two parts, 219 and 35234, that added together give a palindrome (35453).

The spelling of 21935234 in words is "twenty-one million, nine hundred thirty-five thousand, two hundred thirty-four".