21080468 has 24 divisors (see below), whose sum is σ = 37699200. Its totient is φ = 10311840.

The previous prime is 21080467. The next prime is 21080473. The reversal of 21080468 is 86408012.

It is a super-2 number, since 2×21080468² = 888772262198048, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21080468.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21080467) 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, 56330 + ... + 56702.

It is an arithmetic number, because the mean of its divisors is an integer number (1570800).

Almost surely, 2^21080468 is an apocalyptic number.

It is an amenable number.

21080468 is a deficient number, since it is larger than the sum of its proper divisors (16618732).

21080468 is a wasteful number, since it uses less digits than its factorization.

21080468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 21080468 is about 4591.3470790172. The cubic root of 21080468 is about 276.2443575624.

The spelling of 21080468 in words is "twenty-one million, eighty thousand, four hundred sixty-eight".