20570126243557 has 8 divisors (see below), whose sum is σ = 22440359995200. Its totient is φ = 18699929537760.

The previous prime is 20570126243533. The next prime is 20570126243561. The reversal of 20570126243557 is 75534262107502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20570126243557 is a prime.

It is a super-3 number, since 3×20570126243557³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20570126243557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20570126243507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8094057 + ... + 10327342.

It is an arithmetic number, because the mean of its divisors is an integer number (2805044999400).

Almost surely, 2^{20570126243557} is an apocalyptic number.

It is an amenable number.

20570126243557 is a deficient number, since it is larger than the sum of its proper divisors (1870233751643).

20570126243557 is a wasteful number, since it uses less digits than its factorization.

20570126243557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18522923.

The product of its (nonzero) digits is 3528000, while the sum is 49.

The spelling of 20570126243557 in words is "twenty trillion, five hundred seventy billion, one hundred twenty-six million, two hundred forty-three thousand, five hundred fifty-seven".