20257115576543 has 8 divisors (see below), whose sum is σ = 20278684752960. Its totient is φ = 20235549358080.

The previous prime is 20257115576539. The next prime is 20257115576563. The reversal of 20257115576543 is 34567551175202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20257115576543 - 2² = 20257115576539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20257115576513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13102271 + ... + 14566527.

It is an arithmetic number, because the mean of its divisors is an integer number (2534835594120).

Almost surely, 2^{20257115576543} is an apocalyptic number.

20257115576543 is a deficient number, since it is larger than the sum of its proper divisors (21569176417).

20257115576543 is a wasteful number, since it uses less digits than its factorization.

20257115576543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478977.

The product of its (nonzero) digits is 8820000, while the sum is 53.

The spelling of 20257115576543 in words is "twenty trillion, two hundred fifty-seven billion, one hundred fifteen million, five hundred seventy-six thousand, five hundred forty-three".