20330753664553 has 2 divisors, whose sum is σ = 20330753664554. Its totient is φ = 20330753664552.

The previous prime is 20330753664509. The next prime is 20330753664631. The reversal of 20330753664553 is 35546635703302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12493906147584 + 7836847516969 = 3534672^2 + 2799437^2 .

It is a cyclic number.

It is not a de Polignac number, because 20330753664553 - 2³³ = 20322163729961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20330753664553.

It is not a weakly prime, because it can be changed into another prime (20370753664553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165376832276 + 10165376832277.

It is an arithmetic number, because the mean of its divisors is an integer number (10165376832277).

Almost surely, 2^{20330753664553} is an apocalyptic number.

It is an amenable number.

20330753664553 is a deficient number, since it is larger than the sum of its proper divisors (1).

20330753664553 is an equidigital number, since it uses as much as digits as its factorization.

20330753664553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412000, while the sum is 52.

The spelling of 20330753664553 in words is "twenty trillion, three hundred thirty billion, seven hundred fifty-three million, six hundred sixty-four thousand, five hundred fifty-three".