21211480620 has 288 divisors, whose sum is σ = 72641237760. Its totient is φ = 4964820480.

The previous prime is 21211480603. The next prime is 21211480649. The reversal of 21211480620 is 2608411212.

21211480620 is a `hidden beast` number, since 2 + 1 + 21 + 14 + 8 + 0 + 620 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10182099 + ... + 10184181.

It is an arithmetic number, because the mean of its divisors is an integer number (252226520).

Almost surely, 2^21211480620 is an apocalyptic number.

21211480620 is a gapful number since it is divisible by the number (20) 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 21211480620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36320618880).

21211480620 is an abundant number, since it is smaller than the sum of its proper divisors (51429757140).

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

21211480620 is a wasteful number, since it uses less digits than its factorization.

21211480620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285 (or 2280 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

Adding to 21211480620 its reverse (2608411212), we get a palindrome (23819891832).

The spelling of 21211480620 in words is "twenty-one billion, two hundred eleven million, four hundred eighty thousand, six hundred twenty".