20554531424533 has 2 divisors, whose sum is σ = 20554531424534. Its totient is φ = 20554531424532.

The previous prime is 20554531424507. The next prime is 20554531424551. The reversal of 20554531424533 is 33542413545502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20462296519729 + 92234904804 = 4523527^2 + 303702^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20554531424533 is a prime.

It is a super-2 number, since 2×20554531424533² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20554532424533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10277265712266 + 10277265712267.

It is an arithmetic number, because the mean of its divisors is an integer number (10277265712267).

Almost surely, 2^{20554531424533} is an apocalyptic number.

It is an amenable number.

20554531424533 is a deficient number, since it is larger than the sum of its proper divisors (1).

20554531424533 is an equidigital number, since it uses as much as digits as its factorization.

20554531424533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320000, while the sum is 46.

The spelling of 20554531424533 in words is "twenty trillion, five hundred fifty-four billion, five hundred thirty-one million, four hundred twenty-four thousand, five hundred thirty-three".