21232412208 has 240 divisors, whose sum is σ = 72054156096. Its totient is φ = 5697699840.

The previous prime is 21232412183. The next prime is 21232412209. The reversal of 21232412208 is 80221423212.

21232412208 is a `hidden beast` number, since 2 + 12 + 32 + 412 + 208 = 666.

It is not an unprimeable number, because it can be changed into a prime (21232412209) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10983210 + ... + 10985142.

Almost surely, 2^21232412208 is an apocalyptic number.

21232412208 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21232412208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36027078048).

21232412208 is an abundant number, since it is smaller than the sum of its proper divisors (50821743888).

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

21232412208 is a wasteful number, since it uses less digits than its factorization.

21232412208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612 (or 2603 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The spelling of 21232412208 in words is "twenty-one billion, two hundred thirty-two million, four hundred twelve thousand, two hundred eight".