20180221095943 has 2 divisors, whose sum is σ = 20180221095944. Its totient is φ = 20180221095942.

The previous prime is 20180221095929. The next prime is 20180221095977. The reversal of 20180221095943 is 34959012208102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20180221095943 is a prime.

It is a super-2 number, since 2×20180221095943² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20180221095893 and 20180221095902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20180221095913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10090110547971 + 10090110547972.

It is an arithmetic number, because the mean of its divisors is an integer number (10090110547972).

Almost surely, 2^{20180221095943} is an apocalyptic number.

20180221095943 is a deficient number, since it is larger than the sum of its proper divisors (1).

20180221095943 is an equidigital number, since it uses as much as digits as its factorization.

20180221095943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 20180221095943 in words is "twenty trillion, one hundred eighty billion, two hundred twenty-one million, ninety-five thousand, nine hundred forty-three".