20259417503 has 4 divisors (see below), whose sum is σ = 21817834248. Its totient is φ = 18701000760.

The previous prime is 20259417499. The next prime is 20259417547. The reversal of 20259417503 is 30571495202.

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

It is not a de Polignac number, because 20259417503 - 2² = 20259417499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20259417103) 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, 779208353 + ... + 779208378.

It is an arithmetic number, because the mean of its divisors is an integer number (5454458562).

Almost surely, 2^20259417503 is an apocalyptic number.

20259417503 is a deficient number, since it is larger than the sum of its proper divisors (1558416745).

20259417503 is a wasteful number, since it uses less digits than its factorization.

20259417503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558416744.

The product of its (nonzero) digits is 75600, while the sum is 38.

The spelling of 20259417503 in words is "twenty billion, two hundred fifty-nine million, four hundred seventeen thousand, five hundred three".