20530354545 has 48 divisors (see below), whose sum is σ = 35966042112. Its totient is φ = 10833056640.

The previous prime is 20530354541. The next prime is 20530354547. The reversal of 20530354545 is 54545303502.

20530354545 is a `hidden beast` number, since 20 + 53 + 0 + 3 + 545 + 45 = 666.

It is not a de Polignac number, because 20530354545 - 2² = 20530354541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20530354541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2126880 + ... + 2136510.

It is an arithmetic number, because the mean of its divisors is an integer number (749292544).

Almost surely, 2^20530354545 is an apocalyptic number.

It is an amenable number.

20530354545 is a deficient number, since it is larger than the sum of its proper divisors (15435687567).

20530354545 is a wasteful number, since it uses less digits than its factorization.

20530354545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10142 (or 10139 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 36.

The spelling of 20530354545 in words is "twenty billion, five hundred thirty million, three hundred fifty-four thousand, five hundred forty-five".