21663411150234 has 16 divisors (see below), whose sum is σ = 49516368343488. Its totient is φ = 6189546042912.

The previous prime is 21663411150229. The next prime is 21663411150299. The reversal of 21663411150234 is 43205111436612.

It is a junction number, because it is equal to n+sod(n) for n = 21663411150192 and 21663411150201.

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, 257897751747 + ... + 257897751830.

It is an arithmetic number, because the mean of its divisors is an integer number (3094773021468).

Almost surely, 2^{21663411150234} is an apocalyptic number.

21663411150234 is an abundant number, since it is smaller than the sum of its proper divisors (27852957193254).

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

21663411150234 is a wasteful number, since it uses less digits than its factorization.

21663411150234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515795503589.

The product of its (nonzero) digits is 103680, while the sum is 39.

Adding to 21663411150234 its reverse (43205111436612), we get a palindrome (64868522586846).

The spelling of 21663411150234 in words is "twenty-one trillion, six hundred sixty-three billion, four hundred eleven million, one hundred fifty thousand, two hundred thirty-four".