21164212026606 has 32 divisors (see below), whose sum is σ = 46178820288000. Its totient is φ = 6413070127680.

The previous prime is 21164212026541. The next prime is 21164212026647. The reversal of 21164212026606 is 60662021246112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6882406 + ... + 9470793.

It is an arithmetic number, because the mean of its divisors is an integer number (1443088134000).

Almost surely, 2^{21164212026606} is an apocalyptic number.

21164212026606 is an abundant number, since it is smaller than the sum of its proper divisors (25014608261394).

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

21164212026606 is a wasteful number, since it uses less digits than its factorization.

21164212026606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16372824.

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 21164212026606 in words is "twenty-one trillion, one hundred sixty-four billion, two hundred twelve million, twenty-six thousand, six hundred six".