20858541703 has 4 divisors (see below), whose sum is σ = 20878202088. Its totient is φ = 20838881320.

The previous prime is 20858541661. The next prime is 20858541707. The reversal of 20858541703 is 30714585802.

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

It is a cyclic number.

It is not a de Polignac number, because 20858541703 - 2¹³ = 20858533511 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20858541703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20858541707) 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, 9828601 + ... + 9830722.

It is an arithmetic number, because the mean of its divisors is an integer number (5219550522).

Almost surely, 2^20858541703 is an apocalyptic number.

20858541703 is a deficient number, since it is larger than the sum of its proper divisors (19660385).

20858541703 is a wasteful number, since it uses less digits than its factorization.

20858541703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19660384.

The product of its (nonzero) digits is 268800, while the sum is 43.

The spelling of 20858541703 in words is "twenty billion, eight hundred fifty-eight million, five hundred forty-one thousand, seven hundred three".