42840468893 has 4 divisors (see below), whose sum is σ = 42847473948. Its totient is φ = 42833463840.

The previous prime is 42840468859. The next prime is 42840468919. The reversal of 42840468893 is 39886404824.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26543903929 + 16296564964 = 162923^2 + 127658^2 .

It is a cyclic number.

It is not a de Polignac number, because 42840468893 - 2¹⁴ = 42840452509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42840468793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3493346 + ... + 3505587.

It is an arithmetic number, because the mean of its divisors is an integer number (10711868487).

Almost surely, 2^42840468893 is an apocalyptic number.

It is an amenable number.

42840468893 is a deficient number, since it is larger than the sum of its proper divisors (7005055).

42840468893 is an equidigital number, since it uses as much as digits as its factorization.

42840468893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7005054.

The product of its (nonzero) digits is 10616832, while the sum is 56.

The spelling of 42840468893 in words is "forty-two billion, eight hundred forty million, four hundred sixty-eight thousand, eight hundred ninety-three".