21560246106 has 64 divisors (see below), whose sum is σ = 50137651200. Its totient is φ = 6053382720.

The previous prime is 21560246087. The next prime is 21560246119. The reversal of 21560246106 is 60164206512.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1175595 + ... + 1193793.

It is an arithmetic number, because the mean of its divisors is an integer number (783400800).

Almost surely, 2^21560246106 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21560246106, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25068825600).

21560246106 is an abundant number, since it is smaller than the sum of its proper divisors (28577405094).

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

21560246106 is a wasteful number, since it uses less digits than its factorization.

21560246106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18699.

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 21560246106 in words is "twenty-one billion, five hundred sixty million, two hundred forty-six thousand, one hundred six".