21663411150233 has 8 divisors (see below), whose sum is σ = 22207382163456. Its totient is φ = 21120182762400.

The previous prime is 21663411150229. The next prime is 21663411150299. The reversal of 21663411150233 is 33205111436612.

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

It is a cyclic number.

It is not a de Polignac number, because 21663411150233 - 2² = 21663411150229 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21663411150533) 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, 185597273 + ... + 185713958.

It is an arithmetic number, because the mean of its divisors is an integer number (2775922770432).

Almost surely, 2^{21663411150233} is an apocalyptic number.

It is an amenable number.

21663411150233 is a deficient number, since it is larger than the sum of its proper divisors (543971013223).

21663411150233 is a wasteful number, since it uses less digits than its factorization.

21663411150233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371312695.

The product of its (nonzero) digits is 77760, while the sum is 38.

Adding to 21663411150233 its reverse (33205111436612), we get a palindrome (54868522586845).

The spelling of 21663411150233 in words is "twenty-one trillion, six hundred sixty-three billion, four hundred eleven million, one hundred fifty thousand, two hundred thirty-three".