21363766350 has 96 divisors (see below), whose sum is σ = 53454971520. Its totient is φ = 5646387840.

The previous prime is 21363766301. The next prime is 21363766351. The reversal of 21363766350 is 5366736312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21363766351) by changing a digit.

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, 9315804 + ... + 9318096.

It is an arithmetic number, because the mean of its divisors is an integer number (556822620).

Almost surely, 2^21363766350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21363766350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26727485760).

21363766350 is an abundant number, since it is smaller than the sum of its proper divisors (32091205170).

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

21363766350 is a wasteful number, since it uses less digits than its factorization.

21363766350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2834 (or 2829 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 42.

The spelling of 21363766350 in words is "twenty-one billion, three hundred sixty-three million, seven hundred sixty-six thousand, three hundred fifty".