21667231050 has 96 divisors (see below), whose sum is σ = 55122971904. Its totient is φ = 5629056000.

The previous prime is 21667231031. The next prime is 21667231057. The reversal of 21667231050 is 5013276612.

It is not an unprimeable number, because it can be changed into a prime (21667231057) 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, 5268495 + ... + 5272605.

It is an arithmetic number, because the mean of its divisors is an integer number (574197624).

Almost surely, 2^21667231050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21667231050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27561485952).

21667231050 is an abundant number, since it is smaller than the sum of its proper divisors (33455740854).

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

21667231050 is a wasteful number, since it uses less digits than its factorization.

21667231050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5024 (or 5019 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The spelling of 21667231050 in words is "twenty-one billion, six hundred sixty-seven million, two hundred thirty-one thousand, fifty".