20790899783 has 2 divisors, whose sum is σ = 20790899784. Its totient is φ = 20790899782.

The previous prime is 20790899747. The next prime is 20790899821. The reversal of 20790899783 is 38799809702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20790899783 - 2⁸ = 20790899527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20790869783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10395449891 + 10395449892.

It is an arithmetic number, because the mean of its divisors is an integer number (10395449892).

Almost surely, 2^20790899783 is an apocalyptic number.

20790899783 is a deficient number, since it is larger than the sum of its proper divisors (1).

20790899783 is an equidigital number, since it uses as much as digits as its factorization.

20790899783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13716864, while the sum is 62.

The spelling of 20790899783 in words is "twenty billion, seven hundred ninety million, eight hundred ninety-nine thousand, seven hundred eighty-three".