20749493353 has 2 divisors, whose sum is σ = 20749493354. Its totient is φ = 20749493352.

The previous prime is 20749493333. The next prime is 20749493363. The reversal of 20749493353 is 35339494702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14556905104 + 6192588249 = 120652^2 + 78693^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20749493353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20749493297 and 20749493306.

It is not a weakly prime, because it can be changed into another prime (20749493333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10374746676 + 10374746677.

It is an arithmetic number, because the mean of its divisors is an integer number (10374746677).

Almost surely, 2^20749493353 is an apocalyptic number.

It is an amenable number.

20749493353 is a deficient number, since it is larger than the sum of its proper divisors (1).

20749493353 is an equidigital number, since it uses as much as digits as its factorization.

20749493353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 49.

The spelling of 20749493353 in words is "twenty billion, seven hundred forty-nine million, four hundred ninety-three thousand, three hundred fifty-three".