21942835200 has 1440 divisors, whose sum is σ = 98060442480. Its totient is φ = 4777574400.

The previous prime is 21942835171. The next prime is 21942835217. The reversal of 21942835200 is 253824912.

It is a happy number.

21942835200 is a `hidden beast` number, since 2 + 19 + 42 + 83 + 520 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a super-2 number, since 2×21942835200² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 593049582 + ... + 593049618.

Almost surely, 2^21942835200 is an apocalyptic number.

21942835200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21942835200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49030221240).

21942835200 is an abundant number, since it is smaller than the sum of its proper divisors (76117607280).

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

21942835200 is a wasteful number, since it uses less digits than its factorization.

21942835200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 21942835200 in words is "twenty-one billion, nine hundred forty-two million, eight hundred thirty-five thousand, two hundred".