21020244143412 has 24 divisors (see below), whose sum is σ = 49068852632800. Its totient is φ = 7003660005216.

The previous prime is 21020244143323. The next prime is 21020244143441. The reversal of 21020244143412 is 21434144202012.

It is a self number, because there is not a number n which added to its sum of digits gives 21020244143412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385976962 + ... + 386031417.

Almost surely, 2^{21020244143412} is an apocalyptic number.

It is an amenable number.

21020244143412 is an abundant number, since it is smaller than the sum of its proper divisors (28048608489388).

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

21020244143412 is a wasteful number, since it uses less digits than its factorization.

21020244143412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772010655 (or 772010653 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 21020244143412 its reverse (21434144202012), we get a palindrome (42454388345424).

The spelling of 21020244143412 in words is "twenty-one trillion, twenty billion, two hundred forty-four million, one hundred forty-three thousand, four hundred twelve".