21220104950 has 96 divisors (see below), whose sum is σ = 44416442880. Its totient is φ = 7474723200.

The previous prime is 21220104943. The next prime is 21220105013. The reversal of 21220104950 is 5940102212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4861469 + ... + 4865831.

It is an arithmetic number, because the mean of its divisors is an integer number (462671280).

Almost surely, 2^21220104950 is an apocalyptic number.

21220104950 is an abundant number, since it is smaller than the sum of its proper divisors (23196337930).

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

21220104950 is a wasteful number, since it uses less digits than its factorization.

21220104950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4662 (or 4657 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The spelling of 21220104950 in words is "twenty-one billion, two hundred twenty million, one hundred four thousand, nine hundred fifty".