21663113603362 has 48 divisors (see below), whose sum is σ = 42594523122816. Its totient is φ = 8073210024000.

The previous prime is 21663113603269. The next prime is 21663113603363. The reversal of 21663113603362 is 26330631136612.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (21663113603363) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 277964139 + ... + 278042062.

It is an arithmetic number, because the mean of its divisors is an integer number (887385898392).

Almost surely, 2^{21663113603362} is an apocalyptic number.

21663113603362 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21663113603362 is a deficient number, since it is larger than the sum of its proper divisors (20931409519454).

21663113603362 is a wasteful number, since it uses less digits than its factorization.

21663113603362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556006255 (or 556006244 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 43.

Adding to 21663113603362 its reverse (26330631136612), we get a palindrome (47993744739974).

The spelling of 21663113603362 in words is "twenty-one trillion, six hundred sixty-three billion, one hundred thirteen million, six hundred three thousand, three hundred sixty-two".