20575475768728 has 32 divisors (see below), whose sum is σ = 39563541455760. Its totient is φ = 10025751352320.

The previous prime is 20575475768713. The next prime is 20575475768753. The reversal of 20575475768728 is 82786757457502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34283601 + ... + 34878592.

Almost surely, 2^{20575475768728} is an apocalyptic number.

It is an amenable number.

20575475768728 is a deficient number, since it is larger than the sum of its proper divisors (18988065687032).

20575475768728 is a wasteful number, since it uses less digits than its factorization.

20575475768728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69163147 (or 69163143 counting only the distinct ones).

The product of its (nonzero) digits is 1843968000, while the sum is 73.

The spelling of 20575475768728 in words is "twenty trillion, five hundred seventy-five billion, four hundred seventy-five million, seven hundred sixty-eight thousand, seven hundred twenty-eight".