213020281493 has 2 divisors, whose sum is σ = 213020281494. Its totient is φ = 213020281492.

The previous prime is 213020281469. The next prime is 213020281547. The reversal of 213020281493 is 394182020312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211763791684 + 1256489809 = 460178^2 + 35447^2 .

It is a cyclic number.

It is not a de Polignac number, because 213020281493 - 2¹⁴ = 213020265109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213020281423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106510140746 + 106510140747.

It is an arithmetic number, because the mean of its divisors is an integer number (106510140747).

Almost surely, 2^213020281493 is an apocalyptic number.

It is an amenable number.

213020281493 is a deficient number, since it is larger than the sum of its proper divisors (1).

213020281493 is an equidigital number, since it uses as much as digits as its factorization.

213020281493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 213020281493 in words is "two hundred thirteen billion, twenty million, two hundred eighty-one thousand, four hundred ninety-three".