1990301842453 has 2 divisors, whose sum is σ = 1990301842454. Its totient is φ = 1990301842452.

The previous prime is 1990301842391. The next prime is 1990301842517. The reversal of 1990301842453 is 3542481030991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1243187090289 + 747114752164 = 1114983^2 + 864358^2 .

It is a cyclic number.

It is not a de Polignac number, because 1990301842453 - 2²⁹ = 1989764971541 is a prime.

It is a super-2 number, since 2×1990301842453² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1990301842397 and 1990301842406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1990301842253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995150921226 + 995150921227.

It is an arithmetic number, because the mean of its divisors is an integer number (995150921227).

Almost surely, 2^{1990301842453} is an apocalyptic number.

It is an amenable number.

1990301842453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990301842453 is an equidigital number, since it uses as much as digits as its factorization.

1990301842453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 1990301842453 in words is "one trillion, nine hundred ninety billion, three hundred one million, eight hundred forty-two thousand, four hundred fifty-three".