20452523779 has 2 divisors, whose sum is σ = 20452523780. Its totient is φ = 20452523778.

The previous prime is 20452523759. The next prime is 20452523809. The reversal of 20452523779 is 97732525402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20452523779 - 2⁵ = 20452523747 is a prime.

It is not a weakly prime, because it can be changed into another prime (20452523759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10226261889 + 10226261890.

It is an arithmetic number, because the mean of its divisors is an integer number (10226261890).

Almost surely, 2^20452523779 is an apocalyptic number.

20452523779 is a deficient number, since it is larger than the sum of its proper divisors (1).

20452523779 is an equidigital number, since it uses as much as digits as its factorization.

20452523779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1058400, while the sum is 46.

The spelling of 20452523779 in words is "twenty billion, four hundred fifty-two million, five hundred twenty-three thousand, seven hundred seventy-nine".