20552145793651 has 2 divisors, whose sum is σ = 20552145793652. Its totient is φ = 20552145793650.

The previous prime is 20552145793633. The next prime is 20552145793693. The reversal of 20552145793651 is 15639754125502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20552145793651 - 2⁷ = 20552145793523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20552145793592 and 20552145793601.

It is not a weakly prime, because it can be changed into another prime (20552145793601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10276072896825 + 10276072896826.

It is an arithmetic number, because the mean of its divisors is an integer number (10276072896826).

Almost surely, 2^{20552145793651} is an apocalyptic number.

20552145793651 is a deficient number, since it is larger than the sum of its proper divisors (1).

20552145793651 is an equidigital number, since it uses as much as digits as its factorization.

20552145793651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340000, while the sum is 55.

The spelling of 20552145793651 in words is "twenty trillion, five hundred fifty-two billion, one hundred forty-five million, seven hundred ninety-three thousand, six hundred fifty-one".