21941743950 has 144 divisors (see below), whose sum is σ = 67435389216. Its totient is φ = 5010508800.

The previous prime is 21941743949. The next prime is 21941743973. The reversal of 21941743950 is 5934714912.

21941743950 is a `hidden beast` number, since 2 + 1 + 94 + 174 + 395 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 21941743896 and 21941743905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4158514 + ... + 4163786.

It is an arithmetic number, because the mean of its divisors is an integer number (468301314).

Almost surely, 2^21941743950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21941743950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33717694608).

21941743950 is an abundant number, since it is smaller than the sum of its proper divisors (45493645266).

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

21941743950 is a wasteful number, since it uses less digits than its factorization.

21941743950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6619 (or 6611 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 21941743950 in words is "twenty-one billion, nine hundred forty-one million, seven hundred forty-three thousand, nine hundred fifty".