21889650560 has 64 divisors (see below), whose sum is σ = 54018057600. Its totient is φ = 8473405440.

The previous prime is 21889650547. The next prime is 21889650577. The reversal of 21889650560 is 6505698812.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 21889650499 and 21889650508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531815 + ... + 571494.

It is an arithmetic number, because the mean of its divisors is an integer number (844032150).

Almost surely, 2^21889650560 is an apocalyptic number.

21889650560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21889650560 is an abundant number, since it is smaller than the sum of its proper divisors (32128407040).

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

21889650560 is a wasteful number, since it uses less digits than its factorization.

21889650560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103359 (or 1103347 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 21889650560 in words is "twenty-one billion, eight hundred eighty-nine million, six hundred fifty thousand, five hundred sixty".