42620490993 has 4 divisors (see below), whose sum is σ = 56827321328. Its totient is φ = 28413660660.

The previous prime is 42620490937. The next prime is 42620491051. The reversal of 42620490993 is 39909402624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42620490993 - 2²⁰ = 42619442417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42620497993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7103415163 + ... + 7103415168.

It is an arithmetic number, because the mean of its divisors is an integer number (14206830332).

Almost surely, 2^42620490993 is an apocalyptic number.

It is an amenable number.

42620490993 is a deficient number, since it is larger than the sum of its proper divisors (14206830335).

42620490993 is a wasteful number, since it uses less digits than its factorization.

42620490993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14206830334.

The product of its (nonzero) digits is 839808, while the sum is 48.

The spelling of 42620490993 in words is "forty-two billion, six hundred twenty million, four hundred ninety thousand, nine hundred ninety-three".