20257459850 has 48 divisors (see below), whose sum is σ = 38355175320. Its totient is φ = 7958476800.

The previous prime is 20257459841. The next prime is 20257459861. The reversal of 20257459850 is 5895475202.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 7563606961 + 12693852889 = 86969^2 + 112667^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20257459795 and 20257459804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 868136 + ... + 891164.

Almost surely, 2^20257459850 is an apocalyptic number.

20257459850 is a deficient number, since it is larger than the sum of its proper divisors (18097715470).

20257459850 is a wasteful number, since it uses less digits than its factorization.

20257459850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23355 (or 23350 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 47.

The spelling of 20257459850 in words is "twenty billion, two hundred fifty-seven million, four hundred fifty-nine thousand, eight hundred fifty".