21380253672050 has 48 divisors (see below), whose sum is σ = 48944334570432. Its totient is φ = 6766497864000.

The previous prime is 21380253672017. The next prime is 21380253672059. The reversal of 21380253672050 is 5027635208312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21380253671992 and 21380253672010.

It is not an unprimeable number, because it can be changed into a prime (21380253672059) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2349473876 + ... + 2349482975.

It is an arithmetic number, because the mean of its divisors is an integer number (1019673636884).

Almost surely, 2^{21380253672050} is an apocalyptic number.

21380253672050 is an abundant number, since it is smaller than the sum of its proper divisors (27564080898382).

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

21380253672050 is a wasteful number, since it uses less digits than its factorization.

21380253672050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4698956883 (or 4698956878 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 21380253672050 in words is "twenty-one trillion, three hundred eighty billion, two hundred fifty-three million, six hundred seventy-two thousand, fifty".