1020403405493 has 2 divisors, whose sum is σ = 1020403405494. Its totient is φ = 1020403405492.

The previous prime is 1020403405487. The next prime is 1020403405573. The reversal of 1020403405493 is 3945043040201.

1020403405493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1007971824484 + 12431581009 = 1003978^2 + 111497^2 .

It is an emirp because it is prime and its reverse (3945043040201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020403405493 - 2¹⁰ = 1020403404469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020403405423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510201702746 + 510201702747.

It is an arithmetic number, because the mean of its divisors is an integer number (510201702747).

Almost surely, 2^{1020403405493} is an apocalyptic number.

It is an amenable number.

1020403405493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020403405493 is an equidigital number, since it uses as much as digits as its factorization.

1020403405493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 1020403405493 its reverse (3945043040201), we get a palindrome (4965446445694).

The spelling of 1020403405493 in words is "one trillion, twenty billion, four hundred three million, four hundred five thousand, four hundred ninety-three".