21143401030420 has 24 divisors (see below), whose sum is σ = 44720574847200. Its totient is φ = 8396516091552.

The previous prime is 21143401030363. The next prime is 21143401030421. The reversal of 21143401030420 is 2403010434112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21143401030421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3802767190 + ... + 3802772749.

It is an arithmetic number, because the mean of its divisors is an integer number (1863357285300).

Almost surely, 2^{21143401030420} is an apocalyptic number.

21143401030420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21143401030420 is an abundant number, since it is smaller than the sum of its proper divisors (23577173816780).

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

21143401030420 is a wasteful number, since it uses less digits than its factorization.

21143401030420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7605540087 (or 7605540085 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21143401030420 its reverse (2403010434112), we get a palindrome (23546411464532).

The spelling of 21143401030420 in words is "twenty-one trillion, one hundred forty-three billion, four hundred one million, thirty thousand, four hundred twenty".