21474033865838 has 8 divisors (see below), whose sum is σ = 32212555981920. Its totient is φ = 10736515205200.

The previous prime is 21474033865829. The next prime is 21474033865841. The reversal of 21474033865838 is 83856833047412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21474033865838² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250810358 + ... + 250895961.

It is an arithmetic number, because the mean of its divisors is an integer number (4026569497740).

Almost surely, 2^{21474033865838} is an apocalyptic number.

21474033865838 is a deficient number, since it is larger than the sum of its proper divisors (10738522116082).

21474033865838 is a wasteful number, since it uses less digits than its factorization.

21474033865838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501727722.

The product of its (nonzero) digits is 92897280, while the sum is 62.

The spelling of 21474033865838 in words is "twenty-one trillion, four hundred seventy-four billion, thirty-three million, eight hundred sixty-five thousand, eight hundred thirty-eight".