21663411150227 has 24 divisors (see below), whose sum is σ = 27386876105568. Its totient is φ = 16773060395520.

The previous prime is 21663411150217. The next prime is 21663411150229. The reversal of 21663411150227 is 72205111436612.

It is not a de Polignac number, because 21663411150227 - 2¹⁶ = 21663411084691 is a prime.

It is a super-2 number, since 2×21663411150227² (a number of 27 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 81321278 + ... + 81587235.

It is an arithmetic number, because the mean of its divisors is an integer number (1141119837732).

Almost surely, 2^{21663411150227} is an apocalyptic number.

21663411150227 is a deficient number, since it is larger than the sum of its proper divisors (5723464955341).

21663411150227 is a wasteful number, since it uses less digits than its factorization.

21663411150227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162908699 (or 162908688 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

Adding to 21663411150227 its reverse (72205111436612), we get a palindrome (93868522586839).

The spelling of 21663411150227 in words is "twenty-one trillion, six hundred sixty-three billion, four hundred eleven million, one hundred fifty thousand, two hundred twenty-seven".