21296017100 has 18 divisors (see below), whose sum is σ = 46212357324. Its totient is φ = 8518406800.

The previous prime is 21296017063. The next prime is 21296017121. The reversal of 21296017100 is 171069212.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106479986 + ... + 106480185.

Almost surely, 2^21296017100 is an apocalyptic number.

21296017100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21296017100 is an abundant number, since it is smaller than the sum of its proper divisors (24916340224).

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

21296017100 is a wasteful number, since it uses less digits than its factorization.

21296017100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212960185 (or 212960178 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 29.

The spelling of 21296017100 in words is "twenty-one billion, two hundred ninety-six million, seventeen thousand, one hundred".