20648405783 has 2 divisors, whose sum is σ = 20648405784. Its totient is φ = 20648405782.

The previous prime is 20648405749. The next prime is 20648405803. The reversal of 20648405783 is 38750484602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20648405783 - 2¹⁰ = 20648404759 is a prime.

It is a super-2 number, since 2×20648405783² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20648401783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10324202891 + 10324202892.

It is an arithmetic number, because the mean of its divisors is an integer number (10324202892).

Almost surely, 2^20648405783 is an apocalyptic number.

20648405783 is a deficient number, since it is larger than the sum of its proper divisors (1).

20648405783 is an equidigital number, since it uses as much as digits as its factorization.

20648405783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1290240, while the sum is 47.

The spelling of 20648405783 in words is "twenty billion, six hundred forty-eight million, four hundred five thousand, seven hundred eighty-three".