21404683983 has 8 divisors (see below), whose sum is σ = 29235666096. Its totient is φ = 13921745600.

The previous prime is 21404683973. The next prime is 21404683991. The reversal of 21404683983 is 38938640412.

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

It is a cyclic number.

It is not a de Polignac number, because 21404683983 - 2⁶ = 21404683919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21404683943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87010788 + ... + 87011033.

It is an arithmetic number, because the mean of its divisors is an integer number (3654458262).

Almost surely, 2^21404683983 is an apocalyptic number.

21404683983 is a deficient number, since it is larger than the sum of its proper divisors (7830982113).

21404683983 is a wasteful number, since it uses less digits than its factorization.

21404683983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174021865.

The product of its (nonzero) digits is 995328, while the sum is 48.

The spelling of 21404683983 in words is "twenty-one billion, four hundred four million, six hundred eighty-three thousand, nine hundred eighty-three".