21343024043020 has 24 divisors (see below), whose sum is σ = 44821209329568. Its totient is φ = 8537046028800.

The previous prime is 21343024043017. The next prime is 21343024043023. The reversal of 21343024043020 is 2034042034312.

It is an interprime number because it is at equal distance from previous prime (21343024043017) and next prime (21343024043023).

It is a self number, because there is not a number n which added to its sum of digits gives 21343024043020.

It is not an unprimeable number, because it can be changed into a prime (21343024043023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9151696 + ... + 11244535.

It is an arithmetic number, because the mean of its divisors is an integer number (1867550388732).

Almost surely, 2^{21343024043020} is an apocalyptic number.

21343024043020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21343024043020 is an abundant number, since it is smaller than the sum of its proper divisors (23478185286548).

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

21343024043020 is a wasteful number, since it uses less digits than its factorization.

21343024043020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20448561 (or 20448559 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21343024043020 its reverse (2034042034312), we get a palindrome (23377066077332).

The spelling of 21343024043020 in words is "twenty-one trillion, three hundred forty-three billion, twenty-four million, forty-three thousand, twenty".