21953442200 has 48 divisors (see below), whose sum is σ = 51076861080. Its totient is φ = 8775336960.

The previous prime is 21953442197. The next prime is 21953442227. The reversal of 21953442200 is 224435912.

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, 259592 + ... + 333608.

Almost surely, 2^21953442200 is an apocalyptic number.

21953442200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21953442200 is an abundant number, since it is smaller than the sum of its proper divisors (29123418880).

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

21953442200 is a wasteful number, since it uses less digits than its factorization.

21953442200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75516 (or 75507 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 21953442200 in words is "twenty-one billion, nine hundred fifty-three million, four hundred forty-two thousand, two hundred".