21530226042550 has 48 divisors (see below), whose sum is σ = 41341652705952. Its totient is φ = 8335914854400.

The previous prime is 21530226042487. The next prime is 21530226042571. The reversal of 21530226042550 is 5524062203512.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29793106 + ... + 30507205.

It is an arithmetic number, because the mean of its divisors is an integer number (861284431374).

Almost surely, 2^{21530226042550} is an apocalyptic number.

21530226042550 is a deficient number, since it is larger than the sum of its proper divisors (19811426663402).

21530226042550 is a wasteful number, since it uses less digits than its factorization.

21530226042550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60300553 (or 60300548 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 21530226042550 in words is "twenty-one trillion, five hundred thirty billion, two hundred twenty-six million, forty-two thousand, five hundred fifty".