20535353145 has 32 divisors (see below), whose sum is σ = 36917510400. Its totient is φ = 10829123712.

The previous prime is 20535353131. The next prime is 20535353191. The reversal of 20535353145 is 54135353502.

20535353145 is a `hidden beast` number, since 2 + 0 + 53 + 535 + 31 + 45 = 666.

It is not a de Polignac number, because 20535353145 - 2¹⁰ = 20535352121 is a prime.

It is a super-2 number, since 2×20535353145² (a number of 21 digits) contains 22 as substring.

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, 842557 + ... + 866586.

It is an arithmetic number, because the mean of its divisors is an integer number (1153672200).

Almost surely, 2^20535353145 is an apocalyptic number.

It is an amenable number.

20535353145 is a deficient number, since it is larger than the sum of its proper divisors (16382157255).

20535353145 is a wasteful number, since it uses less digits than its factorization.

20535353145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709246 (or 1709240 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 36.

It can be divided in two parts, 20535 and 353145, that added together give a triangular number (373680 = T₈₆₄).

The spelling of 20535353145 in words is "twenty billion, five hundred thirty-five million, three hundred fifty-three thousand, one hundred forty-five".