43000668021 has 16 divisors (see below), whose sum is σ = 58778330688. Its totient is φ = 27946147200.

The previous prime is 43000667947. The next prime is 43000668023. The reversal of 43000668021 is 12086600034.

It is not a de Polignac number, because 43000668021 - 2¹⁰ = 43000666997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43000668021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43000668023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23395 + ... + 294191.

It is an arithmetic number, because the mean of its divisors is an integer number (3673645668).

Almost surely, 2^43000668021 is an apocalyptic number.

43000668021 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

43000668021 is a deficient number, since it is larger than the sum of its proper divisors (15777662667).

43000668021 is a wasteful number, since it uses less digits than its factorization.

43000668021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272132.

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 43000668021 in words is "forty-three billion, six hundred sixty-eight thousand, twenty-one".