21250456634106 has 48 divisors (see below), whose sum is σ = 52935269272704. Its totient is φ = 6035202391392.

The previous prime is 21250456634089. The next prime is 21250456634111. The reversal of 21250456634106 is 60143665405212.

21250456634106 is a `hidden beast` number, since 2 + 1 + 2 + 5 + 0 + 4 + 5 + 6 + 634 + 1 + 0 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 504932305 + ... + 504974388.

It is an arithmetic number, because the mean of its divisors is an integer number (1102818109848).

Almost surely, 2^{21250456634106} is an apocalyptic number.

21250456634106 is an abundant number, since it is smaller than the sum of its proper divisors (31684812638598).

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

21250456634106 is a wasteful number, since it uses less digits than its factorization.

21250456634106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009906875 (or 1009906872 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 21250456634106 in words is "twenty-one trillion, two hundred fifty billion, four hundred fifty-six million, six hundred thirty-four thousand, one hundred six".