21525301530010 has 16 divisors (see below), whose sum is σ = 38889578233800. Its totient is φ = 8578112727616.

The previous prime is 21525301529981. The next prime is 21525301530011. The reversal of 21525301530010 is 1003510352512.

It can be written as a sum of positive squares in 4 ways, for example, as 10191245371129 + 11334056158881 = 3192373^2 + 3366609^2 .

It is not an unprimeable number, because it can be changed into a prime (21525301530011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4000982725 + ... + 4000988104.

Almost surely, 2^{21525301530010} is an apocalyptic number.

21525301530010 is a deficient number, since it is larger than the sum of its proper divisors (17364276703790).

21525301530010 is a wasteful number, since it uses less digits than its factorization.

21525301530010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8001971105.

The product of its (nonzero) digits is 4500, while the sum is 28.

Adding to 21525301530010 its reverse (1003510352512), we get a palindrome (22528811882522).

The spelling of 21525301530010 in words is "twenty-one trillion, five hundred twenty-five billion, three hundred one million, five hundred thirty thousand, ten".