20826715903 has 16 divisors (see below), whose sum is σ = 24053063680. Its totient is φ = 17663891616.

The previous prime is 20826715849. The next prime is 20826715907. The reversal of 20826715903 is 30951762802.

It is not a de Polignac number, because 20826715903 - 2⁹ = 20826715391 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 20826715903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20826715907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306025 + ... + 367837.

It is an arithmetic number, because the mean of its divisors is an integer number (1503316480).

Almost surely, 2^20826715903 is an apocalyptic number.

20826715903 is a deficient number, since it is larger than the sum of its proper divisors (3226347777).

20826715903 is a wasteful number, since it uses less digits than its factorization.

20826715903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62326.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 20826715903 in words is "twenty billion, eight hundred twenty-six million, seven hundred fifteen thousand, nine hundred three".