20554255131563 has 2 divisors, whose sum is σ = 20554255131564. Its totient is φ = 20554255131562.

The previous prime is 20554255131523. The next prime is 20554255131623. The reversal of 20554255131563 is 36513155245502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20554255131563 - 2⁶ = 20554255131499 is a prime.

It is not a weakly prime, because it can be changed into another prime (20554255131523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10277127565781 + 10277127565782.

It is an arithmetic number, because the mean of its divisors is an integer number (10277127565782).

Almost surely, 2^{20554255131563} is an apocalyptic number.

20554255131563 is a deficient number, since it is larger than the sum of its proper divisors (1).

20554255131563 is an equidigital number, since it uses as much as digits as its factorization.

20554255131563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700000, while the sum is 47.

The spelling of 20554255131563 in words is "twenty trillion, five hundred fifty-four billion, two hundred fifty-five million, one hundred thirty-one thousand, five hundred sixty-three".