20257289230064 has 20 divisors (see below), whose sum is σ = 39318961990104. Its totient is φ = 10110460329408.

The previous prime is 20257289230063. The next prime is 20257289230067. The reversal of 20257289230064 is 46003298275202.

It is a junction number, because it is equal to n+sod(n) for n = 20257289229994 and 20257289230021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20257289230063) 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, 1136508662 + ... + 1136526485.

Almost surely, 2^{20257289230064} is an apocalyptic number.

It is an amenable number.

20257289230064 is a deficient number, since it is larger than the sum of its proper divisors (19061672760040).

20257289230064 is a wasteful number, since it uses less digits than its factorization.

20257289230064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273035712 (or 2273035706 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 20257289230064 in words is "twenty trillion, two hundred fifty-seven billion, two hundred eighty-nine million, two hundred thirty thousand, sixty-four".