21663022260213 has 24 divisors (see below), whose sum is σ = 33264046714080. Its totient is φ = 13546444341600.

The previous prime is 21663022260169. The next prime is 21663022260247. The reversal of 21663022260213 is 31206222036612.

21663022260213 is a `hidden beast` number, since 2 + 1 + 6 + 6 + 30 + 2 + 2 + 2 + 602 + 13 = 666.

It is not a de Polignac number, because 21663022260213 - 2¹³ = 21663022252021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21663022260263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 627132931 + ... + 627167472.

It is an arithmetic number, because the mean of its divisors is an integer number (1386001946420).

Almost surely, 2^{21663022260213} is an apocalyptic number.

It is an amenable number.

21663022260213 is a deficient number, since it is larger than the sum of its proper divisors (11601024453867).

21663022260213 is a wasteful number, since it uses less digits than its factorization.

21663022260213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254300529 (or 1254300526 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

Adding to 21663022260213 its reverse (31206222036612), we get a palindrome (52869244296825).

The spelling of 21663022260213 in words is "twenty-one trillion, six hundred sixty-three billion, twenty-two million, two hundred sixty thousand, two hundred thirteen".