1820018191093 has 2 divisors, whose sum is σ = 1820018191094. Its totient is φ = 1820018191092.

The previous prime is 1820018190983. The next prime is 1820018191097. The reversal of 1820018191093 is 3901918100281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1226474296369 + 593543894724 = 1107463^2 + 770418^2 .

It is a cyclic number.

It is not a de Polignac number, because 1820018191093 - 2²¹ = 1820016093941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1820018191097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910009095546 + 910009095547.

It is an arithmetic number, because the mean of its divisors is an integer number (910009095547).

Almost surely, 2^{1820018191093} is an apocalyptic number.

It is an amenable number.

1820018191093 is a deficient number, since it is larger than the sum of its proper divisors (1).

1820018191093 is an equidigital number, since it uses as much as digits as its factorization.

1820018191093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 43.

The spelling of 1820018191093 in words is "one trillion, eight hundred twenty billion, eighteen million, one hundred ninety-one thousand, ninety-three".