21620500422050 has 24 divisors (see below), whose sum is σ = 40814341698576. Its totient is φ = 8519122553040.

The previous prime is 21620500422023. The next prime is 21620500422133. The reversal of 21620500422050 is 5022400502612.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3226937012 + ... + 3226943711.

It is an arithmetic number, because the mean of its divisors is an integer number (1700597570774).

Almost surely, 2^{21620500422050} is an apocalyptic number.

21620500422050 is a deficient number, since it is larger than the sum of its proper divisors (19193841276526).

21620500422050 is a wasteful number, since it uses less digits than its factorization.

21620500422050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6453880802 (or 6453880797 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 21620500422050 its reverse (5022400502612), we get a palindrome (26642900924662).

The spelling of 21620500422050 in words is "twenty-one trillion, six hundred twenty billion, five hundred million, four hundred twenty-two thousand, fifty".