20122625740661 has 2 divisors, whose sum is σ = 20122625740662. Its totient is φ = 20122625740660.

The previous prime is 20122625740627. The next prime is 20122625740739. The reversal of 20122625740661 is 16604752622102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16912705600036 + 3209920140625 = 4112506^2 + 1791625^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122625740661 - 2¹⁰ = 20122625739637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20122625760661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061312870330 + 10061312870331.

It is an arithmetic number, because the mean of its divisors is an integer number (10061312870331).

Almost surely, 2^{20122625740661} is an apocalyptic number.

It is an amenable number.

20122625740661 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122625740661 is an equidigital number, since it uses as much as digits as its factorization.

20122625740661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 20122625740661 in words is "twenty trillion, one hundred twenty-two billion, six hundred twenty-five million, seven hundred forty thousand, six hundred sixty-one".