21041669598 has 8 divisors (see below), whose sum is σ = 42083339208. Its totient is φ = 7013889864.

The previous prime is 21041669581. The next prime is 21041669599. The reversal of 21041669598 is 89596614012.

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

21041669598 is an admirable number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 21041669598.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041669599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1753472461 + ... + 1753472472.

It is an arithmetic number, because the mean of its divisors is an integer number (5260417401).

Almost surely, 2^21041669598 is an apocalyptic number.

21041669598 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21041669598 is a wasteful number, since it uses less digits than its factorization.

21041669598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3506944938.

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 21041669598 in words is "twenty-one billion, forty-one million, six hundred sixty-nine thousand, five hundred ninety-eight".