21662663152152 has 32 divisors (see below), whose sum is σ = 59079990415680. Its totient is φ = 6564443379360.

The previous prime is 21662663152147. The next prime is 21662663152159. The reversal of 21662663152152 is 25125136626612.

It is a super-2 number, since 2×21662663152152² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21662663152159) 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, 41027770858 + ... + 41027771385.

It is an arithmetic number, because the mean of its divisors is an integer number (1846249700490).

Almost surely, 2^{21662663152152} is an apocalyptic number.

21662663152152 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21662663152152 is an abundant number, since it is smaller than the sum of its proper divisors (37417327263528).

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

21662663152152 is a wasteful number, since it uses less digits than its factorization.

21662663152152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82055542263 (or 82055542259 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 48.

Adding to 21662663152152 its reverse (25125136626612), we get a palindrome (46787799778764).

The spelling of 21662663152152 in words is "twenty-one trillion, six hundred sixty-two billion, six hundred sixty-three million, one hundred fifty-two thousand, one hundred fifty-two".