21460635606 has 16 divisors (see below), whose sum is σ = 42993658224. Its totient is φ = 7141480704.

The previous prime is 21460635589. The next prime is 21460635611. The reversal of 21460635606 is 60653606412.

It is a super-2 number, since 2×21460635606² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3012271 + ... + 3019386.

It is an arithmetic number, because the mean of its divisors is an integer number (2687103639).

Almost surely, 2^21460635606 is an apocalyptic number.

21460635606 is an abundant number, since it is smaller than the sum of its proper divisors (21533022618).

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

21460635606 is a wasteful number, since it uses less digits than its factorization.

21460635606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6032255.

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 21460635606 in words is "twenty-one billion, four hundred sixty million, six hundred thirty-five thousand, six hundred six".