20903673353 has 2 divisors, whose sum is σ = 20903673354. Its totient is φ = 20903673352.

The previous prime is 20903673313. The next prime is 20903673361. The reversal of 20903673353 is 35337630902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16725731584 + 4177941769 = 129328^2 + 64637^2 .

It is a cyclic number.

It is not a de Polignac number, because 20903673353 - 2²⁰ = 20902624777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20903673353.

It is not a weakly prime, because it can be changed into another prime (20903673313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10451836676 + 10451836677.

It is an arithmetic number, because the mean of its divisors is an integer number (10451836677).

Almost surely, 2^20903673353 is an apocalyptic number.

It is an amenable number.

20903673353 is a deficient number, since it is larger than the sum of its proper divisors (1).

20903673353 is an equidigital number, since it uses as much as digits as its factorization.

20903673353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 306180, while the sum is 41.

The spelling of 20903673353 in words is "twenty billion, nine hundred three million, six hundred seventy-three thousand, three hundred fifty-three".