21598350630 has 16 divisors (see below), whose sum is σ = 51836041584. Its totient is φ = 5759560160.

The previous prime is 21598350617. The next prime is 21598350649. The reversal of 21598350630 is 3605389512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359972481 + ... + 359972540.

It is an arithmetic number, because the mean of its divisors is an integer number (3239752599).

Almost surely, 2^21598350630 is an apocalyptic number.

21598350630 is an abundant number, since it is smaller than the sum of its proper divisors (30237690954).

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

21598350630 is a wasteful number, since it uses less digits than its factorization.

21598350630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719945031.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 21598350630 in words is "twenty-one billion, five hundred ninety-eight million, three hundred fifty thousand, six hundred thirty".