21663411124532 has 96 divisors (see below), whose sum is σ = 40042011985920. Its totient is φ = 10240479406080.

The previous prime is 21663411124517. The next prime is 21663411124543. The reversal of 21663411124532 is 23542111436612.

It is a self number, because there is not a number n which added to its sum of digits gives 21663411124532.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2305349258 + ... + 2305358654.

It is an arithmetic number, because the mean of its divisors is an integer number (417104291520).

Almost surely, 2^{21663411124532} is an apocalyptic number.

It is an amenable number.

21663411124532 is a deficient number, since it is larger than the sum of its proper divisors (18378600861388).

21663411124532 is a wasteful number, since it uses less digits than its factorization.

21663411124532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11241 (or 11239 counting only the distinct ones).

The product of its digits is 207360, while the sum is 41.

The spelling of 21663411124532 in words is "twenty-one trillion, six hundred sixty-three billion, four hundred eleven million, one hundred twenty-four thousand, five hundred thirty-two".