21041322530 has 64 divisors (see below), whose sum is σ = 40596691968. Its totient is φ = 7834411200.

The previous prime is 21041322527. The next prime is 21041322539. The reversal of 21041322530 is 3522314012.

It is a super-2 number, since 2×21041322530² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 21041322496 and 21041322505.

It is not an unprimeable number, because it can be changed into a prime (21041322539) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1270805 + ... + 1287255.

It is an arithmetic number, because the mean of its divisors is an integer number (634323312).

Almost surely, 2^21041322530 is an apocalyptic number.

21041322530 is a deficient number, since it is larger than the sum of its proper divisors (19555369438).

21041322530 is a wasteful number, since it uses less digits than its factorization.

21041322530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16631.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 21041322530 its reverse (3522314012), we get a palindrome (24563636542).

The spelling of 21041322530 in words is "twenty-one billion, forty-one million, three hundred twenty-two thousand, five hundred thirty".