21041425013 has 12 divisors (see below), whose sum is σ = 24693374700. Its totient is φ = 17875896192.

The previous prime is 21041425003. The next prime is 21041425021. The reversal of 21041425013 is 31052414012.

It can be written as a sum of positive squares in 2 ways, for example, as 477291409 + 20564133604 = 21847^2 + 143402^2 .

It is not a de Polignac number, because 21041425013 - 2¹⁴ = 21041408629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21041425013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041425003) 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, 1894538 + ... + 1905611.

It is an arithmetic number, because the mean of its divisors is an integer number (2057781225).

Almost surely, 2^21041425013 is an apocalyptic number.

It is an amenable number.

21041425013 is a deficient number, since it is larger than the sum of its proper divisors (3651949687).

21041425013 is a wasteful number, since it uses less digits than its factorization.

21041425013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3800276 (or 3800269 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 21041425013 its reverse (31052414012), we get a palindrome (52093839025).

The spelling of 21041425013 in words is "twenty-one billion, forty-one million, four hundred twenty-five thousand, thirteen".