20524441613 has 8 divisors (see below), whose sum is σ = 22104527256. Its totient is φ = 18944539200.

The previous prime is 20524441571. The next prime is 20524441631. The reversal of 20524441613 is 31614442502.

It can be written as a sum of positive squares in 4 ways, for example, as 501625609 + 20022816004 = 22397^2 + 141502^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20524441613 - 2¹⁸ = 20524179469 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 20524441613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20524441013) 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, 264983 + ... + 333563.

It is an arithmetic number, because the mean of its divisors is an integer number (2763065907).

Almost surely, 2^20524441613 is an apocalyptic number.

It is an amenable number.

20524441613 is a deficient number, since it is larger than the sum of its proper divisors (1580085643).

20524441613 is a wasteful number, since it uses less digits than its factorization.

20524441613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91615.

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 20524441613 in words is "twenty billion, five hundred twenty-four million, four hundred forty-one thousand, six hundred thirteen".