20743796747 has 2 divisors, whose sum is σ = 20743796748. Its totient is φ = 20743796746.

The previous prime is 20743796707. The next prime is 20743796753. The reversal of 20743796747 is 74769734702.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20743796747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20743796692 and 20743796701.

It is not a weakly prime, because it can be changed into another prime (20743796707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10371898373 + 10371898374.

It is an arithmetic number, because the mean of its divisors is an integer number (10371898374).

Almost surely, 2^20743796747 is an apocalyptic number.

20743796747 is a deficient number, since it is larger than the sum of its proper divisors (1).

20743796747 is an equidigital number, since it uses as much as digits as its factorization.

20743796747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12446784, while the sum is 56.

The spelling of 20743796747 in words is "twenty billion, seven hundred forty-three million, seven hundred ninety-six thousand, seven hundred forty-seven".