21080196 has 48 divisors (see below), whose sum is σ = 57534400. Its totient is φ = 6656256.

The previous prime is 21080173. The next prime is 21080201. The reversal of 21080196 is 69108012.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3085 + ... + 7188.

Almost surely, 2^21080196 is an apocalyptic number.

It is an amenable number.

21080196 is an abundant number, since it is smaller than the sum of its proper divisors (36454204).

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

21080196 is a wasteful number, since it uses less digits than its factorization.

21080196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10305 (or 10297 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 21080196 is about 4591.3174579852. The cubic root of 21080196 is about 276.2431694359.

The spelling of 21080196 in words is "twenty-one million, eighty thousand, one hundred ninety-six".