21035152050 has 96 divisors (see below), whose sum is σ = 56953229760. Its totient is φ = 5095526400.

The previous prime is 21035152027. The next prime is 21035152057. The reversal of 21035152050 is 5025153012.

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 21035152050.

It is not an unprimeable number, because it can be changed into a prime (21035152057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2558346 + ... + 2566554.

It is an arithmetic number, because the mean of its divisors is an integer number (593262810).

Almost surely, 2^21035152050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21035152050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28476614880).

21035152050 is an abundant number, since it is smaller than the sum of its proper divisors (35918077710).

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

21035152050 is a wasteful number, since it uses less digits than its factorization.

21035152050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9788 (or 9783 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The spelling of 21035152050 in words is "twenty-one billion, thirty-five million, one hundred fifty-two thousand, fifty".