20404811783 has 2 divisors, whose sum is σ = 20404811784. Its totient is φ = 20404811782.

The previous prime is 20404811719. The next prime is 20404811863. The reversal of 20404811783 is 38711840402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20404811783 - 2⁶ = 20404811719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20404811183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10202405891 + 10202405892.

It is an arithmetic number, because the mean of its divisors is an integer number (10202405892).

Almost surely, 2^20404811783 is an apocalyptic number.

20404811783 is a deficient number, since it is larger than the sum of its proper divisors (1).

20404811783 is an equidigital number, since it uses as much as digits as its factorization.

20404811783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 38.

The spelling of 20404811783 in words is "twenty billion, four hundred four million, eight hundred eleven thousand, seven hundred eighty-three".