20530351135 has 32 divisors (see below), whose sum is σ = 29041414272. Its totient is φ = 13638481920.

The previous prime is 20530351097. The next prime is 20530351157. The reversal of 20530351135 is 53115303502.

It is not a de Polignac number, because 20530351135 - 2¹⁷ = 20530220063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 267715 + ... + 335755.

It is an arithmetic number, because the mean of its divisors is an integer number (907544196).

Almost surely, 2^20530351135 is an apocalyptic number.

20530351135 is a deficient number, since it is larger than the sum of its proper divisors (8511063137).

20530351135 is a wasteful number, since it uses less digits than its factorization.

20530351135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68323.

The product of its (nonzero) digits is 6750, while the sum is 28.

Adding to 20530351135 its reverse (53115303502), we get a palindrome (73645654637).

The spelling of 20530351135 in words is "twenty billion, five hundred thirty million, three hundred fifty-one thousand, one hundred thirty-five".