20010088755821 has 2 divisors, whose sum is σ = 20010088755822. Its totient is φ = 20010088755820.

The previous prime is 20010088755799. The next prime is 20010088755869. The reversal of 20010088755821 is 12855788001002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19513466934025 + 496621821796 = 4417405^2 + 704714^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010088755821 - 2¹⁴ = 20010088739437 is a prime.

It is a super-2 number, since 2×20010088755821² (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 (20010088755521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005044377910 + 10005044377911.

It is an arithmetic number, because the mean of its divisors is an integer number (10005044377911).

Almost surely, 2^{20010088755821} is an apocalyptic number.

It is an amenable number.

20010088755821 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010088755821 is an equidigital number, since it uses as much as digits as its factorization.

20010088755821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 358400, while the sum is 47.

The spelling of 20010088755821 in words is "twenty trillion, ten billion, eighty-eight million, seven hundred fifty-five thousand, eight hundred twenty-one".