21663411150033 has 12 divisors (see below), whose sum is σ = 31293945216820. Its totient is φ = 14441188869216.

The previous prime is 21663411149957. The next prime is 21663411150067. The reversal of 21663411150033 is 33005111436612.

21663411150033 is a `hidden beast` number, since 2 + 1 + 6 + 6 + 3 + 4 + 111 + 500 + 33 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1503733207824 + 20159677942209 = 1226268^2 + 4489953^2 .

It is not a de Polignac number, because 21663411150033 - 2²⁴ = 21663394372817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21663411150033.

It is not an unprimeable number, because it can be changed into a prime (21663411150083) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90309466 + ... + 90549027.

Almost surely, 2^{21663411150033} is an apocalyptic number.

It is an amenable number.

21663411150033 is a deficient number, since it is larger than the sum of its proper divisors (9630534066787).

21663411150033 is a wasteful number, since it uses less digits than its factorization.

21663411150033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180871808 (or 180871805 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

Adding to 21663411150033 its reverse (33005111436612), we get a palindrome (54668522586645).

The spelling of 21663411150033 in words is "twenty-one trillion, six hundred sixty-three billion, four hundred eleven million, one hundred fifty thousand, thirty-three".