21623393468 has 24 divisors (see below), whose sum is σ = 38571165360. Its totient is φ = 10603232640.

The previous prime is 21623393461. The next prime is 21623393501. The reversal of 21623393468 is 86439332612.

It is a super-2 number, since 2×21623393468² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21623393461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514223 + ... + 554681.

It is an arithmetic number, because the mean of its divisors is an integer number (1607131890).

Almost surely, 2^21623393468 is an apocalyptic number.

It is an amenable number.

21623393468 is a deficient number, since it is larger than the sum of its proper divisors (16947771892).

21623393468 is a wasteful number, since it uses less digits than its factorization.

21623393468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43037 (or 43035 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 47.

The spelling of 21623393468 in words is "twenty-one billion, six hundred twenty-three million, three hundred ninety-three thousand, four hundred sixty-eight".