4021668519438 has 16 divisors (see below), whose sum is σ = 8043460462080. Its totient is φ = 1340535602616.

The previous prime is 4021668519409. The next prime is 4021668519457. The reversal of 4021668519438 is 8349158661204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4716318 + ... + 5503361.

It is an arithmetic number, because the mean of its divisors is an integer number (502716278880).

Almost surely, 2^{4021668519438} is an apocalyptic number.

4021668519438 is an abundant number, since it is smaller than the sum of its proper divisors (4021791942642).

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

4021668519438 is a wasteful number, since it uses less digits than its factorization.

4021668519438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10285271.

The product of its (nonzero) digits is 9953280, while the sum is 57.

The spelling of 4021668519438 in words is "four trillion, twenty-one billion, six hundred sixty-eight million, five hundred nineteen thousand, four hundred thirty-eight".