21436035 has 16 divisors (see below), whose sum is σ = 35404800. Its totient is φ = 11063520.

The previous prime is 21436027. The next prime is 21436067. The reversal of 21436035 is 53063412.

It is a happy number.

It is not a de Polignac number, because 21436035 - 2³ = 21436027 is a prime.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 21435996 and 21436014.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22585 + ... + 23514.

It is an arithmetic number, because the mean of its divisors is an integer number (2212800).

Almost surely, 2^21436035 is an apocalyptic number.

21436035 is a deficient number, since it is larger than the sum of its proper divisors (13968765).

21436035 is a wasteful number, since it uses less digits than its factorization.

21436035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46138.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 21436035 is about 4629.9065865307. The cubic root of 21436035 is about 277.7888559434.

Adding to 21436035 its reverse (53063412), we get a palindrome (74499447).

The spelling of 21436035 in words is "twenty-one million, four hundred thirty-six thousand, thirty-five".