20425205551133 has 2 divisors, whose sum is σ = 20425205551134. Its totient is φ = 20425205551132.

The previous prime is 20425205551099. The next prime is 20425205551181. The reversal of 20425205551133 is 33115550252402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14358506504644 + 6066699046489 = 3789262^2 + 2463067^2 .

It is a cyclic number.

It is not a de Polignac number, because 20425205551133 - 2²² = 20425201356829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20425205551193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212602775566 + 10212602775567.

It is an arithmetic number, because the mean of its divisors is an integer number (10212602775567).

Almost surely, 2^{20425205551133} is an apocalyptic number.

It is an amenable number.

20425205551133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20425205551133 is an equidigital number, since it uses as much as digits as its factorization.

20425205551133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 20425205551133 in words is "twenty trillion, four hundred twenty-five billion, two hundred five million, five hundred fifty-one thousand, one hundred thirty-three".