20055818556331 has 2 divisors, whose sum is σ = 20055818556332. Its totient is φ = 20055818556330.

The previous prime is 20055818556251. The next prime is 20055818556383. The reversal of 20055818556331 is 13365581855002.

It is an a-pointer prime, because the next prime (20055818556383) can be obtained adding 20055818556331 to its sum of digits (52).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20055818556331 - 2²¹ = 20055816459179 is a prime.

It is a super-2 number, since 2×20055818556331² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20055818056331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10027909278165 + 10027909278166.

It is an arithmetic number, because the mean of its divisors is an integer number (10027909278166).

Almost surely, 2^{20055818556331} is an apocalyptic number.

20055818556331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20055818556331 is an equidigital number, since it uses as much as digits as its factorization.

20055818556331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320000, while the sum is 52.

The spelling of 20055818556331 in words is "twenty trillion, fifty-five billion, eight hundred eighteen million, five hundred fifty-six thousand, three hundred thirty-one".