20525235245 has 8 divisors (see below), whose sum is σ = 24677560440. Its totient is φ = 16388669440.

The previous prime is 20525235223. The next prime is 20525235281. The reversal of 20525235245 is 54253252502.

It can be written as a sum of positive squares in 4 ways, for example, as 209294089 + 20315941156 = 14467^2 + 142534^2 .

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

It is not a de Polignac number, because 20525235245 - 2¹⁸ = 20524973101 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3936980 + ... + 3942189.

It is an arithmetic number, because the mean of its divisors is an integer number (3084695055).

Almost surely, 2^20525235245 is an apocalyptic number.

It is an amenable number.

20525235245 is a deficient number, since it is larger than the sum of its proper divisors (4152325195).

20525235245 is an equidigital number, since it uses as much as digits as its factorization.

20525235245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7879695.

The product of its (nonzero) digits is 120000, while the sum is 35.

Adding to 20525235245 its reverse (54253252502), we get a palindrome (74778487747).

The spelling of 20525235245 in words is "twenty billion, five hundred twenty-five million, two hundred thirty-five thousand, two hundred forty-five".