20777001016403 has 2 divisors, whose sum is σ = 20777001016404. Its totient is φ = 20777001016402.

The previous prime is 20777001016363. The next prime is 20777001016489. The reversal of 20777001016403 is 30461010077702.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20777001016403 is a prime.

It is a super-2 number, since 2×20777001016403² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20777001016903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10388500508201 + 10388500508202.

It is an arithmetic number, because the mean of its divisors is an integer number (10388500508202).

Almost surely, 2^{20777001016403} is an apocalyptic number.

20777001016403 is a deficient number, since it is larger than the sum of its proper divisors (1).

20777001016403 is an equidigital number, since it uses as much as digits as its factorization.

20777001016403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49392, while the sum is 38.

The spelling of 20777001016403 in words is "twenty trillion, seven hundred seventy-seven billion, one million, sixteen thousand, four hundred three".