50021521920 has 640 divisors, whose sum is σ = 191800224000. Its totient is φ = 12315525120.

The previous prime is 50021521919. The next prime is 50021521933. The reversal of 50021521920 is 2912512005.

50021521920 is a `hidden beast` number, since 50 + 0 + 2 + 1 + 521 + 92 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 53844016 + ... + 53844944.

It is an arithmetic number, because the mean of its divisors is an integer number (299687850).

Almost surely, 2^50021521920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50021521920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95900112000).

50021521920 is an abundant number, since it is smaller than the sum of its proper divisors (141778702080).

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

50021521920 is a wasteful number, since it uses less digits than its factorization.

50021521920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021 (or 999 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The spelling of 50021521920 in words is "fifty billion, twenty-one million, five hundred twenty-one thousand, nine hundred twenty".