21354102501006 has 64 divisors (see below), whose sum is σ = 47009187495936. Its totient is φ = 6412938386400.

The previous prime is 21354102500999. The next prime is 21354102501029. The reversal of 21354102501006 is 60010520145312.

It is a congruent 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, 6237751 + ... + 9034253.

It is an arithmetic number, because the mean of its divisors is an integer number (734518554624).

Almost surely, 2^{21354102501006} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21354102501006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23504593747968).

21354102501006 is an abundant number, since it is smaller than the sum of its proper divisors (25655084994930).

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

21354102501006 is a wasteful number, since it uses less digits than its factorization.

21354102501006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2797557.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 21354102501006 its reverse (60010520145312), we get a palindrome (81364622646318).

The spelling of 21354102501006 in words is "twenty-one trillion, three hundred fifty-four billion, one hundred two million, five hundred one thousand, six".