10019435861 has 4 divisors (see below), whose sum is σ = 10054840512. Its totient is φ = 9984031212.

The previous prime is 10019435807. The next prime is 10019435897. The reversal of 10019435861 is 16853491001.

10019435861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 10019435861 - 2²² = 10015241557 is a prime.

It is a super-2 number, since 2×10019435861² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10019434861) 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, 17701901 + ... + 17702466.

It is an arithmetic number, because the mean of its divisors is an integer number (2513710128).

Almost surely, 2^10019435861 is an apocalyptic number.

It is an amenable number.

10019435861 is a deficient number, since it is larger than the sum of its proper divisors (35404651).

10019435861 is an equidigital number, since it uses as much as digits as its factorization.

10019435861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35404650.

The product of its (nonzero) digits is 25920, while the sum is 38.

The spelling of 10019435861 in words is "ten billion, nineteen million, four hundred thirty-five thousand, eight hundred sixty-one".