21606226266210 has 16 divisors (see below), whose sum is σ = 51854943038976. Its totient is φ = 5761660337648.

The previous prime is 21606226266203. The next prime is 21606226266241. The reversal of 21606226266210 is 1266262260612.

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, 360103771074 + ... + 360103771133.

It is an arithmetic number, because the mean of its divisors is an integer number (3240933939936).

Almost surely, 2^{21606226266210} is an apocalyptic number.

21606226266210 is an abundant number, since it is smaller than the sum of its proper divisors (30248716772766).

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

21606226266210 is a wasteful number, since it uses less digits than its factorization.

21606226266210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720207542217.

The product of its (nonzero) digits is 248832, while the sum is 42.

The spelling of 21606226266210 in words is "twenty-one trillion, six hundred six billion, two hundred twenty-six million, two hundred sixty-six thousand, two hundred ten".