20257459863 has 8 divisors (see below), whose sum is σ = 27036404976. Its totient is φ = 13491744000.

The previous prime is 20257459861. The next prime is 20257459883. The reversal of 20257459863 is 36895475202.

It is a happy number.

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

It is not a de Polignac number, because 20257459863 - 2¹ = 20257459861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20257459861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3303738 + ... + 3309863.

It is an arithmetic number, because the mean of its divisors is an integer number (3379550622).

Almost surely, 2^20257459863 is an apocalyptic number.

20257459863 is a deficient number, since it is larger than the sum of its proper divisors (6778945113).

20257459863 is a wasteful number, since it uses less digits than its factorization.

20257459863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6614625.

The product of its (nonzero) digits is 3628800, while the sum is 51.

The spelling of 20257459863 in words is "twenty billion, two hundred fifty-seven million, four hundred fifty-nine thousand, eight hundred sixty-three".