20451198988799 has 2 divisors, whose sum is σ = 20451198988800. Its totient is φ = 20451198988798.

The previous prime is 20451198988771. The next prime is 20451198988823. The reversal of 20451198988799 is 99788989115402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20451198988799 - 2⁸ = 20451198988543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20451198988499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10225599494399 + 10225599494400.

It is an arithmetic number, because the mean of its divisors is an integer number (10225599494400).

Almost surely, 2^{20451198988799} is an apocalyptic number.

20451198988799 is a deficient number, since it is larger than the sum of its proper divisors (1).

20451198988799 is an equidigital number, since it uses as much as digits as its factorization.

20451198988799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 940584960, while the sum is 80.

The spelling of 20451198988799 in words is "twenty trillion, four hundred fifty-one billion, one hundred ninety-eight million, nine hundred eighty-eight thousand, seven hundred ninety-nine".