21620470371112 has 32 divisors (see below), whose sum is σ = 41404278499200. Its totient is φ = 10579366969344.

The previous prime is 21620470371077. The next prime is 21620470371119. The reversal of 21620470371112 is 21117307402612.

It is not an unprimeable number, because it can be changed into a prime (21620470371119) 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, 2281123 + ... + 6960205.

It is an arithmetic number, because the mean of its divisors is an integer number (1293883703100).

Almost surely, 2^{21620470371112} is an apocalyptic number.

It is an amenable number.

21620470371112 is a deficient number, since it is larger than the sum of its proper divisors (19783808128088).

21620470371112 is a wasteful number, since it uses less digits than its factorization.

21620470371112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4691425 (or 4691421 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

Adding to 21620470371112 its reverse (21117307402612), we get a palindrome (42737777773724).

The spelling of 21620470371112 in words is "twenty-one trillion, six hundred twenty billion, four hundred seventy million, three hundred seventy-one thousand, one hundred twelve".