21663411150002 has 8 divisors (see below), whose sum is σ = 32576151930012. Its totient is φ = 10804693840000.

The previous prime is 21663411149957. The next prime is 21663411150067. The reversal of 21663411150002 is 20005111436612.

It can be written as a sum of positive squares in 2 ways, for example, as 18836476690201 + 2826934459801 = 4340101^2 + 1681349^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21663411150002² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13505866499 + ... + 13505868102.

Almost surely, 2^{21663411150002} is an apocalyptic number.

21663411150002 is a deficient number, since it is larger than the sum of its proper divisors (10912740780010).

21663411150002 is a wasteful number, since it uses less digits than its factorization.

21663411150002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27011735004.

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 21663411150002 its reverse (20005111436612), we get a palindrome (41668522586614).

The spelling of 21663411150002 in words is "twenty-one trillion, six hundred sixty-three billion, four hundred eleven million, one hundred fifty thousand, two".