20749493363 has 2 divisors, whose sum is σ = 20749493364. Its totient is φ = 20749493362.

The previous prime is 20749493353. The next prime is 20749493371. The reversal of 20749493363 is 36339494702.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20749493363 - 2¹⁶ = 20749427827 is a prime.

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, 10374746681 + 10374746682.

It is an arithmetic number, because the mean of its divisors is an integer number (10374746682).

Almost surely, 2^20749493363 is an apocalyptic number.

20749493363 is a deficient number, since it is larger than the sum of its proper divisors (1).

20749493363 is an equidigital number, since it uses as much as digits as its factorization.

20749493363 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2939328, while the sum is 50.

The spelling of 20749493363 in words is "twenty billion, seven hundred forty-nine million, four hundred ninety-three thousand, three hundred sixty-three".