21973650000 has 240 divisors, whose sum is σ = 71349683328. Its totient is φ = 5826880000.

The previous prime is 21973649983. The next prime is 21973650029. The reversal of 21973650000 is 5637912.

It is a tau number, because it is divible by the number of its divisors (240).

It is a zygodrome in base 5.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39449722 + ... + 39450278.

Almost surely, 2^21973650000 is an apocalyptic number.

21973650000 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 21973650000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35674841664).

21973650000 is an abundant number, since it is smaller than the sum of its proper divisors (49376033328).

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

21973650000 is an equidigital number, since it uses as much as digits as its factorization.

21973650000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856 (or 830 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 33.

The spelling of 21973650000 in words is "twenty-one billion, nine hundred seventy-three million, six hundred fifty thousand".