20257053602351 has 4 divisors (see below), whose sum is σ = 20332358634600. Its totient is φ = 20181748570104.

The previous prime is 20257053602323. The next prime is 20257053602353. The reversal of 20257053602351 is 15320635075202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20257053602351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20257053602299 and 20257053602308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20257053602353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37652515721 + ... + 37652516258.

It is an arithmetic number, because the mean of its divisors is an integer number (5083089658650).

Almost surely, 2^{20257053602351} is an apocalyptic number.

20257053602351 is a deficient number, since it is larger than the sum of its proper divisors (75305032249).

20257053602351 is an equidigital number, since it uses as much as digits as its factorization.

20257053602351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75305032248.

The product of its (nonzero) digits is 378000, while the sum is 41.

Adding to 20257053602351 its reverse (15320635075202), we get a palindrome (35577688677553).

The spelling of 20257053602351 in words is "twenty trillion, two hundred fifty-seven billion, fifty-three million, six hundred two thousand, three hundred fifty-one".