21663411150228 has 24 divisors (see below), whose sum is σ = 50548961773632. Its totient is φ = 7220993846784.

The previous prime is 21663411150217. The next prime is 21663411150229. The reversal of 21663411150228 is 82205111436612.

It is a self number, because there is not a number n which added to its sum of digits gives 21663411150228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21663411150229) 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, 17269200 + ... + 18481127.

It is an arithmetic number, because the mean of its divisors is an integer number (2106206740568).

Almost surely, 2^{21663411150228} is an apocalyptic number.

It is an amenable number.

21663411150228 is an abundant number, since it is smaller than the sum of its proper divisors (28885550623404).

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

21663411150228 is a wasteful number, since it uses less digits than its factorization.

21663411150228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35800831 (or 35800829 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 21663411150228 in words is "twenty-one trillion, six hundred sixty-three billion, four hundred eleven million, one hundred fifty thousand, two hundred twenty-eight".