21341946420 has 144 divisors (see below), whose sum is σ = 67258271808. Its totient is φ = 5680730880.

The previous prime is 21341946413. The next prime is 21341946443. The reversal of 21341946420 is 2464914312.

21341946420 is a `hidden beast` number, since 2 + 1 + 3 + 4 + 1 + 9 + 4 + 642 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2849080 + ... + 2856560.

It is an arithmetic number, because the mean of its divisors is an integer number (467071332).

Almost surely, 2^21341946420 is an apocalyptic number.

21341946420 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 21341946420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33629135904).

21341946420 is an abundant number, since it is smaller than the sum of its proper divisors (45916325388).

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

21341946420 is a wasteful number, since it uses less digits than its factorization.

21341946420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8092 (or 8078 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 21341946420 in words is "twenty-one billion, three hundred forty-one million, nine hundred forty-six thousand, four hundred twenty".