42878330020013 has 2 divisors, whose sum is σ = 42878330020014. Its totient is φ = 42878330020012.

The previous prime is 42878330020007. The next prime is 42878330020051. The reversal of 42878330020013 is 31002003387824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28720885300969 + 14157444719044 = 5359187^2 + 3762638^2 .

It is a cyclic number.

It is not a de Polignac number, because 42878330020013 - 2⁶ = 42878330019949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42878330022013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21439165010006 + 21439165010007.

It is an arithmetic number, because the mean of its divisors is an integer number (21439165010007).

Almost surely, 2^{42878330020013} is an apocalyptic number.

It is an amenable number.

42878330020013 is a deficient number, since it is larger than the sum of its proper divisors (1).

42878330020013 is an equidigital number, since it uses as much as digits as its factorization.

42878330020013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 42878330020013 in words is "forty-two trillion, eight hundred seventy-eight billion, three hundred thirty million, twenty thousand, thirteen".