43420345202109 has 4 divisors (see below), whose sum is σ = 57893793602816. Its totient is φ = 28946896801404.

The previous prime is 43420345202033. The next prime is 43420345202159. The reversal of 43420345202109 is 90120254302434.

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 43420345202109 - 2⁴³ = 34624252179901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43420345202159) 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, 7236724200349 + ... + 7236724200354.

It is an arithmetic number, because the mean of its divisors is an integer number (14473448400704).

Almost surely, 2^{43420345202109} is an apocalyptic number.

It is an amenable number.

43420345202109 is a deficient number, since it is larger than the sum of its proper divisors (14473448400707).

43420345202109 is a wasteful number, since it uses less digits than its factorization.

43420345202109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14473448400706.

The product of its (nonzero) digits is 207360, while the sum is 39.

The spelling of 43420345202109 in words is "forty-three trillion, four hundred twenty billion, three hundred forty-five million, two hundred two thousand, one hundred nine".