20354726823 has 4 divisors (see below), whose sum is σ = 27139635768. Its totient is φ = 13569817880.

The previous prime is 20354726813. The next prime is 20354726837. The reversal of 20354726823 is 32862745302.

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 20354726823 - 2⁹ = 20354726311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20354726813) 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, 3392454468 + ... + 3392454473.

It is an arithmetic number, because the mean of its divisors is an integer number (6784908942).

Almost surely, 2^20354726823 is an apocalyptic number.

20354726823 is a deficient number, since it is larger than the sum of its proper divisors (6784908945).

20354726823 is an equidigital number, since it uses as much as digits as its factorization.

20354726823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6784908944.

The product of its (nonzero) digits is 483840, while the sum is 42.

The spelling of 20354726823 in words is "twenty billion, three hundred fifty-four million, seven hundred twenty-six thousand, eight hundred twenty-three".