21410333420 has 144 divisors (see below), whose sum is σ = 53866340640. Its totient is φ = 7122318336.

The previous prime is 21410333389. The next prime is 21410333431. The reversal of 21410333420 is 2433301412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18963416 + ... + 18964544.

It is an arithmetic number, because the mean of its divisors is an integer number (374071810).

Almost surely, 2^21410333420 is an apocalyptic number.

21410333420 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 21410333420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26933170320).

21410333420 is an abundant number, since it is smaller than the sum of its proper divisors (32456007220).

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

21410333420 is a wasteful number, since it uses less digits than its factorization.

21410333420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712 (or 1703 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21410333420 its reverse (2433301412), we get a palindrome (23843634832).

The spelling of 21410333420 in words is "twenty-one billion, four hundred ten million, three hundred thirty-three thousand, four hundred twenty".