21435107 has 2 divisors, whose sum is σ = 21435108. Its totient is φ = 21435106.

The previous prime is 21435101. The next prime is 21435133. The reversal of 21435107 is 70153412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21435107 - 2¹⁴ = 21418723 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21435101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10717553 + 10717554.

It is an arithmetic number, because the mean of its divisors is an integer number (10717554).

Almost surely, 2^21435107 is an apocalyptic number.

21435107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21435107 is an equidigital number, since it uses as much as digits as its factorization.

21435107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 21435107 is about 4629.8063674413. The cubic root of 21435107 is about 277.7848472453.

Adding to 21435107 its reverse (70153412), we get a palindrome (91588519).

The spelling of 21435107 in words is "twenty-one million, four hundred thirty-five thousand, one hundred seven".