43091320920 has 32 divisors (see below), whose sum is σ = 129273963120. Its totient is φ = 11491018880.

The previous prime is 43091320913. The next prime is 43091320931. The reversal of 43091320920 is 2902319034.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179547051 + ... + 179547290.

Almost surely, 2^43091320920 is an apocalyptic number.

43091320920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43091320920 is an abundant number, since it is smaller than the sum of its proper divisors (86182642200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43091320920 is a wasteful number, since it uses less digits than its factorization.

43091320920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359094355 (or 359094351 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

Adding to 43091320920 its reverse (2902319034), we get a palindrome (45993639954).

The spelling of 43091320920 in words is "forty-three billion, ninety-one million, three hundred twenty thousand, nine hundred twenty".