21106775060 has 192 divisors, whose sum is σ = 53133470208. Its totient is φ = 6892978176.

The previous prime is 21106775029. The next prime is 21106775083. The reversal of 21106775060 is 6057760112.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 21106775060.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62631212 + ... + 62631548.

It is an arithmetic number, because the mean of its divisors is an integer number (276736824).

Almost surely, 2^21106775060 is an apocalyptic number.

21106775060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21106775060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26566735104).

21106775060 is an abundant number, since it is smaller than the sum of its proper divisors (32026695148).

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

21106775060 is a wasteful number, since it uses less digits than its factorization.

21106775060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 35.

The spelling of 21106775060 in words is "twenty-one billion, one hundred six million, seven hundred seventy-five thousand, sixty".