21126468 has 24 divisors (see below), whose sum is σ = 53776800. Its totient is φ = 6401920.

The previous prime is 21126467. The next prime is 21126481. The reversal of 21126468 is 86462112.

It is not an unprimeable number, because it can be changed into a prime (21126463) 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, 79893 + ... + 80156.

It is an arithmetic number, because the mean of its divisors is an integer number (2240700).

Almost surely, 2^21126468 is an apocalyptic number.

It is an amenable number.

21126468 is an abundant number, since it is smaller than the sum of its proper divisors (32650332).

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

21126468 is a wasteful number, since it uses less digits than its factorization.

21126468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160067 (or 160065 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 21126468 is about 4596.3537722852. The cubic root of 21126468 is about 276.4451438819.

It can be divided in two parts, 2112 and 6468, that multiplied together give a square (13660416 = 3696²).

The spelling of 21126468 in words is "twenty-one million, one hundred twenty-six thousand, four hundred sixty-eight".