21530545202350 has 24 divisors (see below), whose sum is σ = 40334920665480. Its totient is φ = 8550259674720.

The previous prime is 21530545202323. The next prime is 21530545202357. The reversal of 21530545202350 is 5320254503512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21530545202357) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1548953137 + ... + 1548967036.

It is an arithmetic number, because the mean of its divisors is an integer number (1680621694395).

Almost surely, 2^{21530545202350} is an apocalyptic number.

21530545202350 is a deficient number, since it is larger than the sum of its proper divisors (18804375463130).

21530545202350 is a wasteful number, since it uses less digits than its factorization.

21530545202350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3097920324 (or 3097920319 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 37.

Adding to 21530545202350 its reverse (5320254503512), we get a palindrome (26850799705862).

The spelling of 21530545202350 in words is "twenty-one trillion, five hundred thirty billion, five hundred forty-five million, two hundred two thousand, three hundred fifty".