21196008 has 48 divisors (see below), whose sum is σ = 60786180. Its totient is φ = 6649344.

The previous prime is 21196003. The next prime is 21196009. The reversal of 21196008 is 80069112.

It can be written as a sum of positive squares in 2 ways, for example, as 18818244 + 2377764 = 4338^2 + 1542^2 .

It is not an unprimeable number, because it can be changed into a prime (21196003) 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, 7435 + ... + 9882.

Almost surely, 2^21196008 is an apocalyptic number.

It is an amenable number.

21196008 is an abundant number, since it is smaller than the sum of its proper divisors (39590172).

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

21196008 is a wasteful number, since it uses less digits than its factorization.

21196008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17346 (or 17339 counting only the distinct ones).

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

The square root of 21196008 is about 4603.9122493810. The cubic root of 21196008 is about 276.7481278164.

The spelling of 21196008 in words is "twenty-one million, one hundred ninety-six thousand, eight".