21620470036012 has 12 divisors (see below), whose sum is σ = 37835963937016. Its totient is φ = 10810194625440.

The previous prime is 21620470035991. The next prime is 21620470036031. The reversal of 21620470036012 is 21063007402612.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8877414 + ... + 11047597.

Almost surely, 2^{21620470036012} is an apocalyptic number.

It is an amenable number.

21620470036012 is a deficient number, since it is larger than the sum of its proper divisors (16215493901004).

21620470036012 is a wasteful number, since it uses less digits than its factorization.

21620470036012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20196288 (or 20196286 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

Adding to 21620470036012 its reverse (21063007402612), we get a palindrome (42683477438624).

The spelling of 21620470036012 in words is "twenty-one trillion, six hundred twenty billion, four hundred seventy million, thirty-six thousand, twelve".