21700370600 has 24 divisors (see below), whose sum is σ = 50453362110. Its totient is φ = 8680148160.

The previous prime is 21700370563. The next prime is 21700370639. The reversal of 21700370600 is 607300712.

It can be written as a sum of positive squares in 3 ways, for example, as 19662209284 + 2038161316 = 140222^2 + 45146^2 .

It is a super-3 number, since 3×21700370600³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21700370600.

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, 54250727 + ... + 54251126.

Almost surely, 2^21700370600 is an apocalyptic number.

21700370600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21700370600 is an abundant number, since it is smaller than the sum of its proper divisors (28752991510).

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

21700370600 is a wasteful number, since it uses less digits than its factorization.

21700370600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108501869 (or 108501860 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 26.

The spelling of 21700370600 in words is "twenty-one billion, seven hundred million, three hundred seventy thousand, six hundred".