21355466747106 has 16 divisors (see below), whose sum is σ = 44567930602944. Its totient is φ = 6808989397584.

The previous prime is 21355466747053. The next prime is 21355466747119. The reversal of 21355466747106 is 60174766455312.

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, 77374879381 + ... + 77374879656.

It is an arithmetic number, because the mean of its divisors is an integer number (2785495662684).

Almost surely, 2^{21355466747106} is an apocalyptic number.

21355466747106 is an abundant number, since it is smaller than the sum of its proper divisors (23212463855838).

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

21355466747106 is a wasteful number, since it uses less digits than its factorization.

21355466747106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154749759065.

The product of its (nonzero) digits is 25401600, while the sum is 57.

The spelling of 21355466747106 in words is "twenty-one trillion, three hundred fifty-five billion, four hundred sixty-six million, seven hundred forty-seven thousand, one hundred six".