20401047878713 has 2 divisors, whose sum is σ = 20401047878714. Its totient is φ = 20401047878712.

The previous prime is 20401047878699. The next prime is 20401047878747. The reversal of 20401047878713 is 31787874010402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13672149622569 + 6728898256144 = 3697587^2 + 2594012^2 .

It is a cyclic number.

It is not a de Polignac number, because 20401047878713 - 2⁹ = 20401047878201 is a prime.

It is not a weakly prime, because it can be changed into another prime (20401047878753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200523939356 + 10200523939357.

It is an arithmetic number, because the mean of its divisors is an integer number (10200523939357).

Almost surely, 2^{20401047878713} is an apocalyptic number.

It is an amenable number.

20401047878713 is a deficient number, since it is larger than the sum of its proper divisors (1).

20401047878713 is an equidigital number, since it uses as much as digits as its factorization.

20401047878713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2107392, while the sum is 52.

The spelling of 20401047878713 in words is "twenty trillion, four hundred one billion, forty-seven million, eight hundred seventy-eight thousand, seven hundred thirteen".