21092910200 has 48 divisors (see below), whose sum is σ = 49100559000. Its totient is φ = 8426920320.

The previous prime is 21092910151. The next prime is 21092910217. The reversal of 21092910200 is 201929012.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21092910200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102191 + ... + 229409.

Almost surely, 2^21092910200 is an apocalyptic number.

21092910200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21092910200 is an abundant number, since it is smaller than the sum of its proper divisors (28007648800).

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

21092910200 is a wasteful number, since it uses less digits than its factorization.

21092910200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128064 (or 128055 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 21092910200 in words is "twenty-one billion, ninety-two million, nine hundred ten thousand, two hundred".