20621442536412 has 48 divisors (see below), whose sum is σ = 48438481308672. Its totient is φ = 6827851195200.

The previous prime is 20621442536407. The next prime is 20621442536417. The reversal of 20621442536412 is 21463524412602.

It is an interprime number because it is at equal distance from previous prime (20621442536407) and next prime (20621442536417).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20621442536417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28311658 + ... + 29030894.

It is an arithmetic number, because the mean of its divisors is an integer number (1009135027264).

Almost surely, 2^{20621442536412} is an apocalyptic number.

It is an amenable number.

20621442536412 is an abundant number, since it is smaller than the sum of its proper divisors (27817038772260).

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

20621442536412 is a wasteful number, since it uses less digits than its factorization.

20621442536412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735218 (or 735216 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 42.

The spelling of 20621442536412 in words is "twenty trillion, six hundred twenty-one billion, four hundred forty-two million, five hundred thirty-six thousand, four hundred twelve".