21425355171006 has 32 divisors (see below), whose sum is σ = 42919825615488. Its totient is φ = 7130275108320.

The previous prime is 21425355171001. The next prime is 21425355171013. The reversal of 21425355171006 is 60017155352412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21425355171001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8104701 + ... + 10418103.

It is an arithmetic number, because the mean of its divisors is an integer number (1341244550484).

Almost surely, 2^{21425355171006} is an apocalyptic number.

21425355171006 is an abundant number, since it is smaller than the sum of its proper divisors (21494470444482).

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

21425355171006 is a wasteful number, since it uses less digits than its factorization.

21425355171006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315896.

The product of its (nonzero) digits is 252000, while the sum is 42.

The spelling of 21425355171006 in words is "twenty-one trillion, four hundred twenty-five billion, three hundred fifty-five million, one hundred seventy-one thousand, six".