21403301220 has 96 divisors (see below), whose sum is σ = 76100640000. Its totient is φ = 4892182272.

The previous prime is 21403301209. The next prime is 21403301221. The reversal of 21403301220 is 2210330412.

21403301220 is a `hidden beast` number, since 2 + 140 + 3 + 301 + 220 = 666.

It is a super-2 number, since 2×21403301220² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21403301193 and 21403301202.

It is not an unprimeable number, because it can be changed into a prime (21403301221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2827345 + ... + 2834904.

It is an arithmetic number, because the mean of its divisors is an integer number (792715000).

Almost surely, 2^21403301220 is an apocalyptic number.

21403301220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21403301220 is an abundant number, since it is smaller than the sum of its proper divisors (54697338780).

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

21403301220 is a wasteful number, since it uses less digits than its factorization.

21403301220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5662274 (or 5662266 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21403301220 its reverse (2210330412), we get a palindrome (23613631632).

The spelling of 21403301220 in words is "twenty-one billion, four hundred three million, three hundred one thousand, two hundred twenty".