21080496 has 60 divisors (see below), whose sum is σ = 56394456. Its totient is φ = 6785280.

The previous prime is 21080473. The next prime is 21080497. The reversal of 21080496 is 69408012.

It is not an unprimeable number, because it can be changed into a prime (21080497) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45900 + ... + 46356.

Almost surely, 2^21080496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21080496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28197228).

21080496 is an abundant number, since it is smaller than the sum of its proper divisors (35313960).

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

21080496 is a wasteful number, since it uses less digits than its factorization.

21080496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 21080496 is about 4591.3501282303. The cubic root of 21080496 is about 276.2444798689.

The spelling of 21080496 in words is "twenty-one million, eighty thousand, four hundred ninety-six".