20257004757157 has 8 divisors (see below), whose sum is σ = 23429788635456. Its totient is φ = 17153952392832.

The previous prime is 20257004757007. The next prime is 20257004757211. The reversal of 20257004757157 is 75175740075202.

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 20257004757157 - 2¹¹ = 20257004755109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20257004797157) 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, 17432877868 + ... + 17432879029.

It is an arithmetic number, because the mean of its divisors is an integer number (2928723579432).

Almost surely, 2^{20257004757157} is an apocalyptic number.

It is an amenable number.

20257004757157 is a deficient number, since it is larger than the sum of its proper divisors (3172783878299).

20257004757157 is an equidigital number, since it uses as much as digits as its factorization.

20257004757157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34865756987.

The product of its (nonzero) digits is 4802000, while the sum is 52.

The spelling of 20257004757157 in words is "twenty trillion, two hundred fifty-seven billion, four million, seven hundred fifty-seven thousand, one hundred fifty-seven".