20641502135 has 8 divisors (see below), whose sum is σ = 24777966096. Its totient is φ = 16507759360.

The previous prime is 20641502129. The next prime is 20641502149. The reversal of 20641502135 is 53120514602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20641502135 - 2⁶ = 20641502071 is a prime.

It is a super-2 number, since 2×20641502135² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20641502098 and 20641502107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 663569 + ... + 693978.

It is an arithmetic number, because the mean of its divisors is an integer number (3097245762).

Almost surely, 2^20641502135 is an apocalyptic number.

20641502135 is a deficient number, since it is larger than the sum of its proper divisors (4136463961).

20641502135 is a wasteful number, since it uses less digits than its factorization.

20641502135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360593.

The product of its (nonzero) digits is 7200, while the sum is 29.

The spelling of 20641502135 in words is "twenty billion, six hundred forty-one million, five hundred two thousand, one hundred thirty-five".