21652420242135 has 32 divisors (see below), whose sum is σ = 36273507153408. Its totient is φ = 11008173080960.

The previous prime is 21652420242121. The next prime is 21652420242151. The reversal of 21652420242135 is 53124202425612.

It is not a de Polignac number, because 21652420242135 - 2⁴ = 21652420242119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21652420242093 and 21652420242102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106998981 + ... + 107201150.

It is an arithmetic number, because the mean of its divisors is an integer number (1133547098544).

Almost surely, 2^{21652420242135} is an apocalyptic number.

21652420242135 is a deficient number, since it is larger than the sum of its proper divisors (14621086911273).

21652420242135 is a wasteful number, since it uses less digits than its factorization.

21652420242135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214200455.

The product of its (nonzero) digits is 230400, while the sum is 39.

Adding to 21652420242135 its reverse (53124202425612), we get a palindrome (74776622667747).

The spelling of 21652420242135 in words is "twenty-one trillion, six hundred fifty-two billion, four hundred twenty million, two hundred forty-two thousand, one hundred thirty-five".