21219232050 has 36 divisors (see below), whose sum is σ = 57009004650. Its totient is φ = 5658461760.

The previous prime is 21219232039. The next prime is 21219232051. The reversal of 21219232050 is 5023291212.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 20488773321 + 730458729 = 143139^2 + 27027^2 .

It is not an unprimeable number, because it can be changed into a prime (21219232051) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23576475 + ... + 23577374.

Almost surely, 2^21219232050 is an apocalyptic number.

21219232050 is an abundant number, since it is smaller than the sum of its proper divisors (35789772600).

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

21219232050 is a wasteful number, since it uses less digits than its factorization.

21219232050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47153867 (or 47153859 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The spelling of 21219232050 in words is "twenty-one billion, two hundred nineteen million, two hundred thirty-two thousand, fifty".