20345650223 has 4 divisors (see below), whose sum is σ = 20345949408. Its totient is φ = 20345351040.

The previous prime is 20345650219. The next prime is 20345650279. The reversal of 20345650223 is 32205654302.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 32205654302 = 2 ⋅16102827151.

It is a cyclic number.

It is not a de Polignac number, because 20345650223 - 2² = 20345650219 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 20345650223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20345650723) 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, 7178 + ... + 201848.

It is an arithmetic number, because the mean of its divisors is an integer number (5086487352).

Almost surely, 2^20345650223 is an apocalyptic number.

20345650223 is a deficient number, since it is larger than the sum of its proper divisors (299185).

20345650223 is a wasteful number, since it uses less digits than its factorization.

20345650223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299184.

The product of its (nonzero) digits is 43200, while the sum is 32.

The spelling of 20345650223 in words is "twenty billion, three hundred forty-five million, six hundred fifty thousand, two hundred twenty-three".