1811812023253 has 2 divisors, whose sum is σ = 1811812023254. Its totient is φ = 1811812023252.

The previous prime is 1811812023221. The next prime is 1811812023283. The reversal of 1811812023253 is 3523202181181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1694805611409 + 117006411844 = 1301847^2 + 342062^2 .

It is a cyclic number.

It is not a de Polignac number, because 1811812023253 - 2⁵ = 1811812023221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1811812023283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 905906011626 + 905906011627.

It is an arithmetic number, because the mean of its divisors is an integer number (905906011627).

Almost surely, 2^{1811812023253} is an apocalyptic number.

It is an amenable number.

1811812023253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1811812023253 is an equidigital number, since it uses as much as digits as its factorization.

1811812023253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 37.

The spelling of 1811812023253 in words is "one trillion, eight hundred eleven billion, eight hundred twelve million, twenty-three thousand, two hundred fifty-three".