21707055100 has 36 divisors (see below), whose sum is σ = 47114953200. Its totient is φ = 8680860160.

The previous prime is 21707055079. The next prime is 21707055101. The reversal of 21707055100 is 155070712.

It is a super-2 number, since 2×21707055100² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21707055101) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 469836 + ... + 513964.

It is an arithmetic number, because the mean of its divisors is an integer number (1308748700).

Almost surely, 2^21707055100 is an apocalyptic number.

21707055100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21707055100 is an abundant number, since it is smaller than the sum of its proper divisors (25407898100).

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

21707055100 is a wasteful number, since it uses less digits than its factorization.

21707055100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49062 (or 49055 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 28.

The spelling of 21707055100 in words is "twenty-one billion, seven hundred seven million, fifty-five thousand, one hundred".