20535021135 has 24 divisors (see below), whose sum is σ = 35850119760. Its totient is φ = 10873216512.

The previous prime is 20535021113. The next prime is 20535021149. The reversal of 20535021135 is 53112053502.

It is a happy number.

20535021135 is a `hidden beast` number, since 20 + 5 + 3 + 502 + 1 + 135 = 666.

It is not a de Polignac number, because 20535021135 - 2⁷ = 20535021007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20535021099 and 20535021108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1635234 + ... + 1647743.

It is an arithmetic number, because the mean of its divisors is an integer number (1493754990).

Almost surely, 2^20535021135 is an apocalyptic number.

20535021135 is a deficient number, since it is larger than the sum of its proper divisors (15315098625).

20535021135 is a wasteful number, since it uses less digits than its factorization.

20535021135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283127 (or 3283124 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

Adding to 20535021135 its reverse (53112053502), we get a palindrome (73647074637).

The spelling of 20535021135 in words is "twenty billion, five hundred thirty-five million, twenty-one thousand, one hundred thirty-five".